Design Product color: Black Weight and dimensions Product width: 75 mm Product depth: 20 mm Product height: 48 mm Product weight: 37 g Efficiency Number of channels: 4 channels FM Radio: Yes Maximum range: 1200 m Bluetooth version: 5.2 Temperature range (operation): -20 - 55 °C Package contents Number of pieces: 1 Battery Standby time: 10 days Charging time: 2 hours Talk time: 13 h