Philippines

Advanced Micro Devices, volume: 1.85 * 2.11cm
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 4Ω 8Ω 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.

Package:
2 x PAM8403 Ultra Miniature Digital Power Amplifier Board

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.