Features:
Built-in Bluetooth wireless transmission call hands-free function.
Simply connect your smartphone tablet and other devices to the speaker via Bluetooth.
Thanks to the integrated USB port and TFcard slot you can listen to your music anytime and anywhere from your USB stick or TF card.
Supports all external 3.5mm terminals audio input.
Support FM auto search station.
Fit your home office ect.
Compact size lets you easily move it about from room to room.

Description:
Signal to noise ratio: ≥ 84dB
Sensitivity: 80db+2db
Output power: 3W
Magnetic speaker: 4Ω 3W 40MM
Input voltage: DC 5V
Working voltage: 3 to 5.5V
Battery Capacity: 600 mAh
Charging time: 3hours