high-definition dual speaker and independent bass diaphragm which allows you to enjoy 3d stereo Hifi sound effects, strong enough to fill up a kitchen, living room, or classroom. It is light weight and with mini size for you to carry anywhere with you, ideal for personal or public usage, indoor party or outdoor BBQ or picnic, driving even traveling with friends and family. Feature - Great compatibility. Compatible with iOS, Android, Blackberry, and Windows smart phones, HTC, LG, SONY, Tablets, MP3 Players and more smartphones and digital devices. - Long Battery Life: Built-in li-ion 2000mAh rechargeable battery offers up to 8 hours of playtime. - Support a variety of sound format in lossless audio sound , MP3, WAV, WMA, etc. - Equipped with high-definition dual speaker and independent bass diaphragm, allowing you to enjoy the 3d stereo Hifi sound effects. - Multiple Modes. Switch among Wireless , FM Radio and TF by pressing the M key. Specification - Color: Black - Material: ABS Plastic. - Size: Approx. 33.5 x 6 x 10 cm/ 13.1 x 2.36 x 3.93 inch (L x W x H) - Model: DW-7046BT - Version: V4.1 - Audio port: TF/ U disk/ USB/ AUX - TF Extension: 32G to the Max (Not Included) - Connector: 3.5mm Audio input - Working Frequency: 90Hz~18KHz - FM radio frequency: 88MHZ-108MHZ - Power: 5W x 2 - Battery Capacity: 3.7V 2000mAh lithium battery - Input voltage: DC5V, 500mA - Charging interface: Micro-USB - Charging time: About 3-4h - Playback time: About 8h - Wireless Range: Up to 33 feet (10 meters in open air) - Noise Rtio: ge;80dB - Functions: Pause / Play, Turn on / off, Last song / Volume Up, Next track/ Volume Down, Answer/hang up - Application: 3D SoundBox Speaker for TV PC Computer Phone