Main FeaturesBluetooth SpeakerBluetooth Latest Version 2.1 Listen to Music Wirelessly Superior Audio Quality Battery or DC Power Supply DC5V Mini USB ConnectorProduct SpecificationsBluetooth Specification: V2.1 + EDR Bluetooth Profiles Supported: A2DP, AVRCPTransmission Power: Class 2Operation Range: Up to 10 MetersPower Supply: Nokia BL-5C Battery (external) DC Power: 3.7V/500mAh/800mAh/1000mAh(optional)Dimensions(mm): L220 x W72 x H40