Livall Smart MTB Helmet Livall MT1 Neo Intercom/LED/SOS/BT 58-62cm

Compliance certificates: Federal Communications Commission (FCC), RoHS, CE Bluetooth: Yes Construction type: Hard shell construction Built-in microphone: Yes Bluetooth Low Energy (BLE): Yes Rear light: Yes Head circumference: 58 - 62 cm Helmet type: Half helmet Adjustable fit: Yes International Protection (IP) code: IPX4 Microphone sensitivity: -39 dB Built-in LED lighting: Yes Number of ventilation holes: 21 Consumer life stage: Adult LED backlight: Yes Hands-free calling: Yes Number of speakers: 2 Ventilation: Yes Bluetooth version: 4.1 Coloration: Monochromatic Activity: Road cycling, Roller skating, Mountain biking, City cycling Water-resistant: Yes Finish type: Gloss Ventilation type: Fixed Gender: Unisex Product main colour: Black Built-in headphones: Yes Sports headwear type: Helmet SOS alert function: Yes Fall detection: Yes Package width: 305 mm Package depth: 225 mm Package height: 150 mm Weight: 310 g Quantity per pack: 1 pc(s) Battery voltage: 3.7 V Input current: 0.5 A Input voltage: 5 V Battery type: Built-in Standby time: 180 day(s) Charging time: 3 h Battery capacity: 450 mAh Continuous audio playback time: 6 h Battery life (max): 10 h Sustainability certificates: CE, Federal Communications Commission (FCC), RoHS