Overview

The Sena C1 is an affordable smart cycling helmet that combines protective headgear with built-in communication and visibility features — ideal for group rides, commuting, or everyday cycling. With integrated Bluetooth intercom, audio, and a taillight, the C1 makes it easy to stay connected and seen while riding, without needing add-on accessories.

Communication & Audio

Built-in 4-way Bluetooth intercom — enables full-duplex communication between up to four riders, making group rides easier and safer.
Intercom working range up to ~300 m (≈ 0.2 miles) in open terrain, giving enough distance for riders to stay connected.
Speakers and microphone built into helmet — lets riders stream music, get GPS directions, or take calls without using earbuds or external devices.
Compatible with smartphone — supports standard Bluetooth profiles (HSP, HFP, A2DP, AVRCP) for music and voice, and works with the app for easy setup and pairing.

Visibility & Safety Features

Integrated rear LED taillight with multiple brightness/mode options (steady / day-flash / night-flash) — improves visibility in low light or traffic conditions.
Lightweight polycarbonate helmet shell with EPS liner, and a full 19-vent ventilation design — balances safety, protection, and comfort for longer rides.
Secure spin-lock retention system and nylon chin strap — ensures stable, comfortable fit across sizes.
Helmet sizes: M (54–58 cm) and L (58–61 cm) — accommodates a range of adult head sizes.

Battery & Performance

Rechargeable battery offers 6–10 hours talk time (depending on taillight use) — long enough for full-day rides or extended group trips.
Charge time around 2.5 hours — quick to recharge between rides.
Operating temperature range from –10 °C to 55 °C (14 °F to 131 °F) — suitable for diverse climates and weather conditions.

Use Cases & Ideal Riders

The C1 helmet is especially well-suited for:

Group rides or club cycling — intercom lets riders communicate without shouting or stopping.
Commuters or urban riders — built-in taillight and helmet-integrated audio/communication add convenience and safety.
Casual cyclists wanting a simple, all-in-one smart helmet — no need for extra headsets or lights.
Anyone wanting to upgrade a regular ride with connectivity, music, navigation, and visibility — all packaged in a comfortable helmet shell.