Mini Outdoor Style: The one hand size and lanyard hasp design, so you can easily carry it. Working Voltage:3.7V,Built-in 1000mAh Lithium Battery, two hours charge, ten hourse of music to enjoy. Bluetooth 4. 2: Featuring the advanced Bluetooth 4. 2 Technology, Baseus Bluetooth speakers can work well with any Bluetooth-enabled devices. Connect your devices in just 3 seconds with a range up to 33 feet. Small dimensions and the cylindrical shape you can carry a speaker always with you. Put in your bag and use it whenever you want to create a festive, unique environment hassle free! Full Compatibility: compatible with smart phone, tablet PC, laptop, PSP, MP3 & MP4 player, Nexus, and any other Bluetooth popular device, support all devices supporting Bluetooth, offer you high quality 3D surround stereo sound World!