Design Product color: Black Security features: Waterproof IP protection class: IP67 Weight and dimensions Product weight: 50 g Product depth: 12 mm Product height: 35 mm Product width: 67 mm Efficiency Device software updates: Yes Bluetooth profiles HFP A2DP AVRCP FM Radio: Yes Maximum range: 1000 m Number of stations: 10 Automatic volume control: Yes Headset mode: Yes Bluetooth version: 5.0 Package contents Cables: USB Type-A to USB Type-C Quick Start Guide: Yes Mounting kit: Yes Number of pieces: 2 Battery Talk time: 15 h Rechargeable battery: Yes Charging time: 2.5 hours Safety warning Warnings Check the condition of the batteries regularly to prevent leakage. Keep away from children. Do not use near sources of heat or fire.