Excellent noise suppression, in the case of no input audio, ears on the horn and did not hear any noise,Dual channel stereo, 5 v power supply can output 3 w + 3 w power, can direct drive 4 Ω, 8 Ω small speakers, big output power, energy, sound quality is good.Unique without LC filter class D digital power board, can use computer USB power supply directly.Double panel wiring, properly solve wiring caused by ground potential balance and the crosstalk between channels, super mini design, can be easily placed in a variety of digital products within small space, high amplification efficiency.All adopt the whole plate welding machine, welding quality of hand soldering iron welding comparable!

U u u u superfine size: 1.85 * 2.11 cm u u u u

!!!!!Note: the left and right sound channel output end and "negative" can't meet together, otherwise will burn IC, and then good speaker should be taken before electricity (load).

The rated working voltage from 5 V to 2.5 V, the working voltage of 5.5 V.