Product Name: Mobile Phone Sounds Amplifier with Mini Size Portable Lightness Super Bass and Rechargeable Battery Model NO.: BT-15 Conductive Mode: DC Voltage: 5V Output Number: 1 Sound Channel: 2.1 Function: Amplifier Combined Tube Type: IC Amplifier Used For: Civilian Usage: Hi-Fi, AV, KTV System, Mobile Phone and Game Player Type: Mini Amplifier Power: 3W Multi-Functions: Yes Compatible: USB Craft Shell: Craft metal Mesh Trademark: OEM Transport Package: Carton Origin: China HS Code: 85182200 Product Description Mini Size lightness Wireless Portable Full frequency Speaker with Super bass vibratorItem: BT-15Battery Model: Recharging Lithium-ion battery built-in, with power capacity of 3.7V,450Ma/hSpeaker: 3W, 360°surround, super stereo, and super bassPower Output: 3W,Working Voltage: DC 5V/500mAh-1000mAhMaterial: Plastic shellHarmonic Distortion: <0.05% FM:<0.1%Working Temperature: 0ºC-60ºC Frequency response:40Hz-20KHzConstantly music playing time with battery power:8hrs(middle volume)Sound channels:2.0Audio interface:3.5mm Aux plugCharging voltage: DC 5V/1ACharging time:4-5hrsSignal-to-noise ratio : ≥80dBRated yin reactance :4 Ω Playing format: MP3,Size: 42*42*33mm, N. Weight: 36g, packed in color gift boxColor: silver, Golden, Blue, green and RedFeatures:-Simple connecting to the palying media-Mini size:42*42*33mm Lightness:36g-3W surround Speaker Built in , provide precious ,Hi-Fi, super-bass and wide range of sound field-Smart compatible to 99.9% devices including: Computer, most of the mobile phone , Laptop, Tablets or I Pad and PSP.Package:Main body + manual+ USB lineIn color box: 5.2*5.3*5.3cm, N.W,140gram