Philippines

Color: Green
Can using the computer USB port 5V power supply or with a mobile phone charger USB interface 5V power supply 
Can provide 3W (left channel) 3 W (right channel) output power at 4Ω load and 5V supply voltage conditions
Module comprises a short-circuit current protection and over temperature protection
Size: 21 x 18 x 3.4 mm (L x W x H)
High efficiency: 90%
A-Class, B-Class Amplifier efficiency as only about 30%
Class D Amplifier is now highly respected
D-Class Amplifier efficiency is extremely high, not because of the temperature effect on the sound quality
but not Add radiator and take up less space
Noise reduction circuit in the Amplifier board built 
Power on / off without pop noise
Application: LCD TV devices, monitors, Laptop, portable Speakers, Portable DVD players, game consoles, Phone / Handsfree
Operating voltage: 2.5V to 5.5V
Speaker: 4-8ohms, recommended: 4 Ohm
Speaker power: 2-8W
Package Contents:
1 x Amplifier Board
Note: First, turn off and then Aktiv speakers or likely to cause damages to the chip; Because digital Volume control module has a large Volume, so do not be too much to leave the audio signal input signal Cut Limiter.
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.