Rolton K300 Wireless Portable Voice Amplifier Loudspeaker for Teacher / Training

Type: Voice Amplifer Material: UV & ABS Rated Power: 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 Input: DC 5.0V 1A Lithium Battery Capacity: 2200mAH(External) Impedance: 2?? Display Screen: LCD Working Temperature: -5 ~ 40?? Feature: - Support MP3 / WMA / WAV Lossless Decode. - 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 87.5MHz-108MHz. Package Weight : 249 G / 8.78 Ounces Package Dimensions (L*W*H) : 40*30*20 MM / 1.57*1.18*0.79 Inches Retail Packaging: Yes, Colored Box Package Include: 1 x Voice Amplifier 1 x User Manual 1 x USB Cable 1 x 2200mAh Replaceable Battery 1 x Waistband Belt 1 x Professional Wired Headset Microphone