Model NH-BT001 Quantity 1 Piece Color Black + silver Material Steel Compatible Models Cellphones and tablets (Iphone / Ipad) Function Speaker answering phone FM radio Cable Length 80cm Input Voltage 5V Output Voltage 3.7V Output Power 3W Impedance 2.6ohm Sensitivity Very well Frequency Response 60~18Hz SNR (Signal to Noise Ratio) >=95dB FM Radio Yes Power Supply Built-in USB Battery Polymer lithium battery Other Features Portable lightweight easy to carry; Can play music for 2.5~5h; Hands-free bluetooth answering phone easily w/o holding phone w/ hand Packing List 1 x Speaker 1 x Cable (80cm) 1 x English user manual