Features:
Support wirelessly playback of music from your Bluetooth-enabled smart phones or other multimedia devices via Bluetooth connection.
Built-in high-performance speaker, bring you perfect music and high quality loud sound.
Built-in rechargeable 400mAh Li-ion battery ensures long time music play; powered by a included Micro USB charge port.
With a portable lanyard, you can hang it on your backpack, or just put it in your pocket, easy and convenient to carry.

Specifications:
Model Number: BT-01
Bluetooth version: Bluetooth 2.1
Operation range: 10m
Power output: 2W
High-quality built-in rechargeable Li-ion battery: 400mAh
Music Playing Time: 2-3 hours
Frequency Response Range: 60Hz ~ 18KHz
Speaker Impedance: 4ohm
Input Voltage: 3.7V 0.15-0.35A
Color: Black
Main Item size: φ5.2 * 4.2cm / 2.05 * 1.65in
Main item weight: 56g / 1.99oz
Package size: 13.4 * 10.8 * 6.0cm / 5.28 * 4.25 * 2.36in
Package weight: 133g / 4.69oz

Package List:  
1 * Outdoor Bluetooth Speaker
1 * USB Cable
1 * Lanyard
1 * English / Chinese User Manual