Descript: TF card: support; FM radio: yes; Repeat: yes; Loop play: yes; Fast Forward and Fast Forward: Yes; Reverb: yes; Basic functs: music FM audio amplifier power pack; Material: ABS/UV; Output power: 5W Input power: power adapter/USB/Li; Sensitivity: 80db; Distort: 1% (3.7v, 1Khz, 1W); Working : DC 3.7V; Charging : DC 5.0V; Lithium battery capacity: 2200mAH; Impedance: 2 Display: LED; Speaker: 2.5 inches x 1; Audio format: MP3/WAV; Size: about 86mm x 39mm x 117mm (width x depth x height); Working temperature: -5 ~ 40 degrees ; Net weight: about 249g; Packing list: 1 x voice amplifier 1 x user manual 1 x USB cable 1 x hand strap 1 x professal wire-controlled headset microphone 1 x packing box Note: 1. Due to manual measurement, please allow 1-3cm error. Make sure you don't mind before bidding. 2. Due to the difference of different monitors, the picture may not reflect the actual color of the product. Thanks. Related Products:voice amplifier,megaphone,speaker with microphone,voice amplifier for teachers,bullhorn megaphone,voice amplifier wireless microphone,portable pa system,teacher microphone for classroom 1. Support TF card (no more than 32GB) music player, can directly play MP3, WAV format audio. 2. Multi-functal: In addit to the FM stereo radio funct, automatic search and save stats, it can also be used as a 2200mAh power bank for emerncy use. 3. Multiple Accessories: Equipped with adjustable waist or neck strap and detachable belt clip, headset microphone, comfortable and suitable for teachers, es, guides, presentats, etc.. 4. Make it more powerful, bigr, and more solid to avoid puffiness and bloat, and it will be more convenient to carry. 5. Carefully prepared, electrophoretic paint, and exquisite craftsmanship, I believe there will always be one that suits you.