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. Packing list: Intelligent Snow Helmet x1 USB charging cable x1 Instruction manual x1 Product Image:

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