Amplifier -Lossless Mp3 Decoders Module Highlights Generic Brand Lossless Mp3 Decoders Module Description: With the high quality 2W single channel power amplifier. The gold-plated 3.5mm jack connection headset or an external speaker. With MicroUSB power supply interface, with mobile phone data cable, using mobile power or USB charger power supply, can also be used 3.7V lithium battery, 5V USB power supply. Convenient to wire and reassemble; 4 buttons on the board for operation setting. Support MP3 format, auto power on, LED indoctor light when module working. Mp3 decoders lossless power amplifier MP3 player module MP3 decoder player support TF card and USB. Support TF Card (mobile phone memory card), U disk playback mode With the speaker terminals without soldering. Specification: "Prev/V--" key: ""short press"" switch to ""the last song"", long press ""is for""volume decrease"""Next+" key +"": ""short press"" goes to ""next song"", ""long press"" to ""volume up"" The ""P / P / Mode" key": ""short press" " switches to ""play/pause"", ""long press"" is the selection of U and TF disk mode ""Repeat" key": ""short press"" cyclically changes ""single / song"" ( no pressure function) Power range: 3.7-5.5V Dimension: 45mm*36mm Package includes: 1 piece mp3 lossless decoders decoding power amplifier Note: 1 "long press" time is about 2S. 2 If using U disk mode, some 5V power supply suggestions, some U disk does not support 3.7V power supply.