Bluetooth version: V5.0 Frequency response: 20-20 KHz DC Resistance: 32¦¸ Receiver distance: up to 10 meters Inbuilt chargeable battery: 55mAh (Charging box:300mAH) Music/Talk Time: Up to 4 hours Features: Bluetooth, Calling,Sensitivity microphone,Easily charge via USB port Colours: Black with red