Hysnox H9 Motorcycle Helmet Intercom 1000M Range BT5.1 Hands-free Interphone 2-Person Full Duplex Phone Call Music Listening FM Radio IP65 Waterproof Dustproof BT Version: 5.1 BT Profiles: Supports A2DP, AVRCP Signal Frequency Range: 2.402GHz-2.480GHz Intercom Wireless Transmission Range: about 1000m (ideal environment) BT Transmission Distance: about 10m (ideal environment) Working Temperature: 5°C~40°C Battery: 900mAh rechargeable polymer battery (Single) Calling/Intercom Time: about 28 hours Music Playing Time: about 33 hours Standby Time: about 500 hours Charging Time: about 2 hours Charging Voltage: DC 5V 1A Interface: Type-C Waterproof Level: IP65 Horn Diameter: 40mm Material: ABS, Acrylic, Silicone Quantity: 1 Pack, 2 Packs (Optional) Color: Black, Carbon Fiber (Optional) Product Size: Approx. 10.4*5.3*2.4cm/4.09*2.08*0.94in (Single) Product Weight: Approx. 53g/1.87oz (Single) Package Size: Approx. 17.4*13.5*4.6cm/6.85*5.31*1.81in Package Weight: Approx. 384g/13.54oz