Teleheer V6 Pro Motorcycle Helmet BT Intercom Headphone Real-Time BT Intercom Full Duplex Talking ESP Noise Reduction 2PCS Adopt professional CSR BT intercom+ chip, signal is more stable. Full duplex talking, support any 2 paired riders to talk at same time within a maximum of 1200 meters (straight line unobstructed). Built-in 850mAh large capacity battery, long stand-by and working time. It allows easy pairing of to 6 riders, including a host and 5 subs. ESP noise reduction, supports A2DP high-quality stereo sound, which helps reduce annoying noise caused by wind, engine and surroundings. After pairing with your phone via BT, this motorcycle BT intercom will automatically answer calls after 3 seconds, you can also listen to GPS navigation or listen to while riding. Specification: Item weight: Approx. 44g /1.55oz Speaker : 0.25W Color: Black Battery capacity: 850mAh Working voltage: 3.3V-4.2V BT version: V5.1 Brand: Teleheer Item size: 8.8 * 4 * 2.2cm /3.46 * 1.57 * 0.87in Packing list: 2 * Mounting clamp 2 * Intercom 4 * Screw 1 * User manual 4 * sticker 1 * Screw bolt driver 2 * USB cable 2 * Headphone Adopt professional CSR BT intercom+RF chip, the signal is more stable. ESP noise reduction, supports A2DP high-quality stereo sound, which helps reduce annoying noise caused by wind, engine and surroundings. After pairing with your phone via BT, this motorcycle BT intercom will automatically answer calls after 3 seconds, you can also listen to GPS navigation or listen to music while riding. It allows easy pairing of up to 6 riders, including a host and 5 subs. Full duplex talking, support any 2 paired riders to talk at the same time within a maximum range of 1200 meters (straight line unobstructed).