Product Features & Specifications: - Hands-Free Function for Calls - Support Micro SD (TF Card) And USB Flash Drive - With On/Off Switch - Bluetooth: V.4.2 - Voltage: DC5V - Battery Charge Time: 2-3 Hours - Loudspeaker: 44Ohm 3W - Frequency Response 280Hz - 16KHz - Working Distance: Up to 10 Meter - Dimension 92(H) x 92(W) x 46(D)mm - Net Weight 220g