Material: UV & ABS Rated Power: 3W + 3W Input Power: Power Adapter /USB Power Supply / Lithium Battery Degree of Separation: 80dB Distortion Degree: 1% (3.7V, 1Khz, 1W) SNR: 83dB Working Voltage: DC 3.7V Inut: DC 5.0V Lithium Battery Capacity: 1500mAH(External) Impedance: 4 Display Screen: LCD Working Temperature: -5 ~ 40 FM Frequency Range: 76MHz-108MHz Audio Format: MP3 / WAV - This product can Continuous work for 20 hours. - Insert a TF card, then it will support recording function and playing the recording files via the dual 3W HD stereo speakers; the LED display screen shows the information and status of the speaker. - Support Global FM Band 76MHz-108MHz. - Support memory function in case of power-down. - This product stereo loudnesss can reach 95dB. 1 X Product 1 x Instructions 1 x Lithium Battery 1 x Power / Data Line 1 x Lifting Rope