Function & Parameters: 

TF Card: Yes

​USB Disk: No

FM Radio:Yes

Recording: No

Loop play back: Yes

Including Wall Charger: No

Basic function: Music/FM/Flashlight/Audio-In Jack

Material: ABS+UV

Output power: 3W

Input Power: Power Adapter/USB/ Li-ion

Sensitivity: 83db

Distortion: 1%(3.7v,1Khz,1W)

Working Voltage: DC 3.7V

Charging voltage: DC 5.0V---500mA

Llithium Battery Capacity: 1500 mAH

Impedance: 4 ohm

Display: LED

Speaker: 1.5 inch *1+ Passive Radiator*1

Audio Format: MP3

Firmware Upgrade: Available

Dimension: 123mm*32mm*67mm (W*D*H) Approx ( 4.84'' * 1.26''*2.66'') 

Operating Temperature: -5 --- 40 degrees Centigrade 

Net Weight: About 128g

Package Content: 

1* Radio speaker 

1* User manual

1* USB Cable

1* 1500mAh replaceable Battery

1* Strap