Type: Mini Audio Speaker Main Body Material: UV & ABS Power: 5W Input: DC 5.0V Bluetooth: No Screen: Yes Input Power: Power Adapter /USB Power Supply / Lithium Battery Speaker: 2.5 inch X1 roduct Color: Black / Red / Pink Degree of Separation: 80dB Distortion Degree: 1% (3.7V, 1Khz, 1W) SNR: 83dB Working Voltage: DC 3.7V Lithium Battery Capacity: 18650 battery(not included) Impedance: 2 Display Screen: LCD Audio Format: MP3/WAV Size: 85mmX85mmX34mm (WxHxD) Working Temperature: -5 ~ 40 Feature: - 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 MP3 / WAV Lossless Decode. - This product can Continuous work for 72 hours. - This product Single track loudnesss can reach 128dB.