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Super sound quality, on-board 2W mono-channel amplifier (5V power supply up to 3W) directly connected to the speaker (recommended with 4 3W speaker), 3.5mm gold-plated headphone socket can be connected to the headphone or external sound. With Micro USB power supply interface, mobile power supply or USB charger can be used through mobile phone data line, or 3.7V lithium battery can be used, USB 5V power supply. Support TF card (mobile phone memory card), U disk playback mode. Terminals with horns need not be welded, convenient connection. Module design is convenient for refitting. (There are different versions of this module, random delivery)