Output: 3.0W
Input:

L/R: 320mV
S/N: over 80dB

Amp frequency range: 20Hz-15kHz
Battery capacity: 450mAh
Charging voltage: 5V
Charging time: 2.5 hours
Last time: 4 hours
Aux-in: supported
Features:

Lets you enjoy your favorite music in high-quality sound.
Incredible sound: great highs and lows make it perfect for a home audio system
Allows you to stream music from Bluetooth enabled devices such as cellphones, laptops, tablets
Offers a wireless connection range of 10 meters (33 feet)
Convenient buttons for volume, music and call control
LED indicator
Powered by rechargeable battery or USB port
Simple, durable, and classy metal design
3D dynamic bass engine technology makes for superior high-quality bass
Powerful loud speaker along with a solid, metal core for a perfect sound
Dust-proof design