The DYJ Bluetooth speaker offers great quality sound with Bluetooth 3.0 technology. With the ultra-compact size and the soft touch rubber design, it can be easily fitted into a backpack, suitcase or a travel bag. Built-in 2000 mAh rechargeable battery enables an 6-8 hours of playtime on a single charge. This speaker is strong enough to fill up a kitchen, living room or classroom. It is ideal for personal usage, indoor party or outdoor BBQ or picnic with friends and family. Features: LED Lights: Built-in 88 RGB LED lights,5 kinds of music pulsating LED visual display mode. Hi-Fi Sound: Built-in high-quality dual voice coil speakers, bright treble, alto mellow, deep bass, bringing you the perfect music to enjoy. Control Panel: Access to volume, track skip and light effects, make it easy to navigate without having to reach for your device. Built-in microphone,for clear voice call. Wireless: Bluetooth wireless technology allows for an easy simple connection. Playback from up to 31 ft away from any Bluetooth enabled device including, Tablet, Smartphones, iPad, iPhone, PC and More. Battery Life: Built-in high capacity battery,directly to the computer's USB port charging Up to 6-8 hours of music play (depended on the size and source of music). Specifications: Bluetooth version: 3.0+EDR Transmission distance: Up to 33ft/10m Max TF card memory: 32G (not included) Sensitivity: 100dB 5dB Speaker Type: Surround Speaker Power: 3Wx 2 Playing time: 6 - 8 hours Battery : 3.7V 2000mAh Charging: USB port Size: 6.5 x 2.6 x 2.6 inch Weight: 323g / 11.4oz Package List: 1 * Bluetooth Speaker 1 * USB Charging Cable 1 * 3.5mm Audio Cable 1 * User Manual