Complete Guide to Smart Helmet Features: From MIPS to Turn Signals, Crash Detection to Bone Conduction Audio

The helmet is the most important safety accessory in cycling equipment, and with technological advancements, modern helmets are no longer just a hard shell protecting the head. Smart helmets integrate lighting, communication, sensors, and other features, turning the helmet into the rider’s intelligent hub.

Evolution of Safety Protection Technology

MIPS: Multi-directional Impact Protection System

MIPS (Multi-directional Impact Protection System) has become standard equipment on mid-to-high-end helmets. Its principle involves adding a low-friction layer inside the helmet that can slide slightly. In the event of an angled impact, this layer absorbs rotational forces, reducing torsional stress on the brain.

Research shows that most head impacts in cycling accidents are not direct frontal hits but angled, oblique impacts. The MIPS system is specifically designed for this most common impact scenario.

Evolution of MIPS versions:

• MIPS C: Standard version, yellow plastic liner
• MIPS Spherical: Developed in collaboration between Giro and MIPS, featuring a spherical sliding interface between two EPS layers
• MIPS Integra: Integrated design, lighter and more breathable
• MIPS Air: Latest version, using air cushions instead of the plastic liner

WaveCel and SPIN

Beyond MIPS, there are other rotational force protection technologies:

Bontrager WaveCel: Uses a honeycomb-folded structure to replace traditional EPS foam, providing both linear and rotational impact protection. Bontrager claims WaveCel reduces the risk of concussion by 48 times compared to traditional helmets (this figure is disputed).

POC SPIN (Shearing Pad INside): Uses silicone shear pads inside the helmet to provide rotational force protection. POC’s SPIN technology is similar in principle to MIPS but implemented differently.

Smart Feature One: Integrated Lighting

Rear LED Warning Lights

Several smart helmets integrate LED light sets at the rear:

Specialized Prevail 3 / S-Works Prevail 3:

• Rear ANGi LED light
• Pairs with crash detection feature
• Visible up to approximately 200 meters in daylight

Lumos Ultra / Kickstart:

• Front white LED + rear red LED
• Supports turn signal function (requires remote control)
• Brake sensor automatically activates the light
• Brightness and flash patterns configurable via the App

Trek/Bontrager Starvos WaveCel:

• Integrated rear LED daytime running light
• No need to install a separate tail light

Turn Signal System

The most distinctive feature of the Lumos helmet series is the turn signal. LED light sets are located on both sides of the helmet, paired with a remote control mounted on the handlebar. Pressing left or right activates the corresponding turn signal.

Practical usage insights:

• Highly effective at night; drivers behind can easily recognize the signals
• Limited visibility during the day; hand signals are still recommended
• Water resistance of the remote control requires attention
• Turn signals do not auto-cancel; they must be manually turned off

Smart Feature Two: Crash Detection and Emergency Alerts

How It Works

The built-in accelerometer and gyroscope in the helmet continuously monitor head movement. When a sudden impact and abnormal motion pattern resembling a crash are detected, the system initiates an emergency alert sequence:

1. The helmet detects an impact event
2. The phone App receives a notification
3. A countdown begins (typically 30-90 seconds)
4. If the rider does not cancel before the countdown ends
5. An emergency text message is automatically sent to preset emergency contacts
6. The message includes the rider’s GPS location

Comparison of Major Products

Product	Sensor	Countdown Time	Location Sharing	Monthly Fee
Specialized ANGi	Built into helmet	90 seconds	GPS coordinates	Free
Garmin Incident Detection	Built into bike computer	30 seconds	GPS coordinates + map	Free
Apple Watch Fall Detection	Built into watch	60 seconds	GPS coordinates	Free
ICEdot Crash Sensor	External sensor	Customizable	GPS coordinates	Free

False Alarm Issues

The biggest challenge with crash detection is false alarms. The following situations can easily trigger them:

• Helmet dropped on the ground
• Vigorous head shaking
• Intense vibration during off-road riding
• Helmet hitting a door frame or low-hanging object

Most systems handle false alarms through the countdown mechanism—the rider simply cancels before the countdown ends. However, frequent false alarms can reduce willingness to use the feature and may create a “cry wolf” effect with emergency contacts.

Smart Feature Three: Bone Conduction Audio

Technical Principle

Bone conduction audio uses vibration elements inside the helmet to transmit sound directly to the inner ear through the skull, allowing you to hear audio without plugging your ears. This is crucial for cycling because maintaining awareness of ambient sounds is a fundamental requirement for safe riding.

Representative Products

Sena R2 / R2 EVO:

• Built-in bone conduction speakers
• Supports Bluetooth connection to smartphone
• Can answer calls, listen to music, and receive navigation voice prompts
• Supports intercom function (multi-party calls)
• Battery life of approximately 5-6 hours

Coros SafeSound:

• Open-ear audio system (not strictly bone conduction)
• Speakers positioned near the ears but not sealed
• Sound quality superior to traditional bone conduction
• Supports Bluetooth 5.0

Usage Recommendations

1. Volume control: Keep the volume at a level where ambient sounds remain audible; recommended not to exceed 60%
2. Navigation voice prompts: The most suitable use case, reducing the frequency of glancing at the bike computer
3. Phone calls: Acceptable for short calls, but avoid distractions during long rides
4. Music: A personal choice, but recommended to turn off in heavy traffic areas

Smart Feature Four: Communication and Intercom

Communication Needs While Riding

Communication during group rides has always been a pain point. Traditional shouting is inaudible at high speeds or into headwinds, and hand signals have their limitations. Communication systems built into helmets offer a solution.

Sena Intercom System:

• Maximum communication range of approximately 900 meters
• Supports up to 4 people in simultaneous conversation
• Voice quality is acceptable at low to medium speeds
• Wind noise at high speeds still affects call quality

Buying Recommendations

Safety First

No matter how appealing the smart features are, the protective performance of a helmet is always the top priority. When purchasing, verify:

1. Passes safety certifications (e.g., CPSC, CE EN 1078)
2. Equipped with rotational force protection (MIPS or equivalent technology)
3. Proper fit for your head shape: Asian and Western head shapes differ significantly
4. Ventilation performance: Taiwan’s climate is hot, making ventilation extremely important

Choose Features Based on Needs

Commuter riders: Integrated lighting + crash detection (Lumos Ultra recommended)
Road cyclists: MIPS + lightweight + crash detection (Specialized Prevail 3 recommended)
Group ride enthusiasts: Bone conduction audio + intercom function (Sena R2 EVO recommended)
Value seekers: MIPS protection is sufficient; smart features can be added later with external accessories

Price Range Reference

Tier	Price Range	Representative Features
Entry	NT$3,000-5,000	MIPS + basic protection
Mid-range	NT$5,000-8,000	MIPS + integrated lighting
High-end	NT$8,000-12,000	MIPS + lighting + crash detection
Flagship	NT$12,000+	Full features (lighting + audio + communication + detection)

Future Outlook

The development trend of smart helmets is moving toward greater feature integration:

• AR Head-Up Display: Displaying speed, navigation, and other information within the field of view
• Environmental Awareness: Radar detection of vehicles approaching from behind with alerts
• AI Accident Prediction: Using AI to analyze riding patterns and predict potential hazards
• Solar Charging: Using solar panels on the helmet surface to power electronic components

Technology is transforming helmets from passive protection into proactive safety partners, but remember: the best helmet is the one you are willing to wear every time.

Related Reading

• Helmet Technology Decoded: MIPS, WaveCel, and Modern Head Protection Systems
• In-Depth Cycling Helmet Review: MIPS Technology, Ventilation Design, and Mainstream Options in the Taiwan Market
• Cycling Helmet Buying Guide: Three Key Selection Criteria—MIPS, Aerodynamics, and Ventilation
• Cycling Helmet Buying Guide: The Trade-off Between MIPS Technology and Ventilation Design