Description: :Advanced Micro Devices, volume: 20*19mm :Excellent noise suppression in the case is not connected to the input audio, the ear close to the speaker can not hear any noise :Two-channel stereo, 5V power supply can output 3W +3 W power, can directly drive 4 8 small speaker output power, full of energy, good sound quality. :Unique without LC filter Class D digital power board, and can be used directly to the computer's USB powered. :Dual-panel wiring, properly solve the crosstalk between the ground potential balance and channel wiring :Ultra-miniature design, can easily be placed in the internal space for a variety of digital products, ultra high zoom efficiency. :All using the machine for the entire board soldering, hand soldering iron welding quality comparable! :Rated working voltage 2.5-5V, limit operating voltage 5.5V. Note: The left and right channel output of the "negative" can not, and then together, otherwise it will burn the IC and energized speaker (load) connected before. Package Contents: :1*2 Channels 2*3W PAM8403 Class D Audio Amplifier Board Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.