Smart Ski Equipment Protective Gear Winter Sports Helmet

Product information:
Size: free size
Color classification: Graphite Black (57-61cm) pepper White (57-61cm)
Air hole: 15
Main functions: Bluetooth hands-free phone, PTT Mobile phone network intercom, wireless music playback, SOS positioning for help, two-way anti-lost
RF:BT 2.402GHz ~ 2.480GHz Max 6MW
Intercom distance: refer to mobile phone network
Bluetooth: Maximum 10 meters without blocking
Interface: Micro USB, DC 5V/1A charging input
Battery: 3.7V/1000mAh, charging for about 2 hours
Battery life: Up to 16 hours for intercom and 48 hours for standby
Sound: Microphone-35dB, D27mmx 2 320, high fidelity speaker
Operating temperature: We recommend that you use the electronic function in the environment of-20°C to 40°C.