Design Security features: Waterproof Product color: Black Weight and dimensions Product weight: 35 g Product depth: 19 mm Product height: 47 mm Product width: 78 mm Efficiency Temperature range (operation): -20 - 55 °C Number of channels: 2 channels USB port: Yes Maximum range: 400 m FM Radio: No Supported USB type: USB Type-C Device software updates: Yes Bluetooth version: 5.2 Package contents Cables: USB Number of pieces: 1 Battery Standby time: 10 days Charging time: 2 hours Talk time: 10 h