1Two-way intercom, the longest intercom distance is 1200 meters, you will never miss any voice messages from the intercom group. 2Using CSR BC5 Bluetooth 3.0, it can connect three Bluetooth devices at the same time. Using this intercom, you can answer calls, intercom, listen to music, GPS and FM radio. 3Powerful antiinterference ability, can be used with highquality speakers and lownoise headphone amplifiers. Professional CVC soundproof and windproof technology can effectively reduce noise. 4Low consumption, builtin 800mAh polymer battery can provide 15 hours of working time and 350 hours of standby time. 5IPX6 waterproof and 6 Grade dustproof ratings, allowing you to ride on rainy . Simple clip installation can be easily clipped to the helmet. Item Type: Motorcycle Helmet Intercom Color: Black Material: ABS Bluetooth 3.0 Support: HSP/ HFP/ A2DP/ AVRCP/ AGHSP Chip: CSR Battery Capacity: 800mA Battery Type: Polymer Lithium Battery(Built-in) Maximum Intercom Distance: Approx. 1200m/1312.3yd Working Voltage: 3.3V-4.2V Talk Time: 15H Standby Time: 350H Charging Time: 3H Speaker Power: 0.25W With or Without Automatic Volume Adjustment: None Size: Approx. 89x46x20mm/3.5x1.8x0.8in (Please allow 12mm difference due to manual measurement) Maximum Support: 4 people are connected at the same time, and 4 people can chat at the same time Operating Temperature Range: -10-45 (Minimum and Maximum Operating Temperature) Waterproof and Dustproof Rating: IPX6 Waterproof and 6 Grade Dustproof Certification: CE, FCC, TELEC, NCC Application: General, as long as it has bluetooth 3.0 or above, it can be connected 1 x Bluetooth Intercom Host 2 x Helmet Mounting Clip And Clip Accessories 1 x Stereo Headset and Microphone 1 x Hose Microphone 1 x USB Cable 1 x Manual Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.