Features: brand new and high quality Bluetooth-compatible 5.1 provides instant pairing and stable transmission without interruptions. 800mAh battery that can last about 20hours talking for time on a full charge. IP67 water resistant,allows for universal pairing. Suitable for all types of motorcycle helmet. Rider to rider intercom distance : 1200 meters/3937ft. Specifications: Material:ABS Color:Black Bluetooth-compatible Version: 5.1 Battery Capacity:800mAh Playing Time:up to 22Hours Standby:About 33Days Talk:CVC Call Noise Reduction Intercom Distance:About 1200meters/3937ft Number of Intercoms:6 People Noise Reduction Ability:120KM/H Speed Note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Headphone 2X Mounting Bracket with connected speakers and spring clip 1x USB Cable 1X Microphone