Color Black + Silver + Multi-Colored Model BL-19 Material Aluminium Quantity 1 Piece Bluetooth Handsfree Yes Bluetooth Version V3.0 Operating Range 10 meters Total Power 3 W Channels 2.0 Interface Others Microphone Yes SNR 95dB Frequency Response 280Hz~16KHz Impedance 4 ohm Applicable Products OthersUniversal Radio Tuner No Supports Card Type MicroSD (TF) Max Extended Capacity 8GB Built-in Battery Capacity 520 mAh Battery Type Li-ion battery Talk Time 2~3 Hour Standby Time 48 Hour Music Play Time 4~5 Hour Plug Specifications OthersUSB Power Supply DC: 5V Other Features Can be as a external wired speaker or bluetooth speaker; Supports hands-free speaking; Supports control by cellphone; Supports choose last next and pause; Can watch moive or voice talking on computer w/ bluetooth adapter. Packing List 1 x Speaker 1 x English manual 1 x Charging cable (49cm)