Item Type: Bluetooth Speaker Material: ABS RMS: 3W Sound Input: AUX, USB, Memory Card FM Frequency: 87108MHz BT: 5.1 Distance: 10m/10.9yd Built in Polymer Lithium Battery: 450mAh Charging Interface: Type C DC 5V Memory Card: Maximum Support 64G (not Included) Package List 1 x Bluetooth Speaker 1 x Charging Cable 1 x Carrying Strap 1 x Sound Cord 1 x Instruction Manual 1BASS: The diaphragm on the back has a woofer function that emphasizes bass and achieves a rich sound. Supports 3W rated power. 2WIRELESS CONNECTION: It is a wireless dual stereo speaker that does not require wires. You can easily connect two speakers wirelessly to fill your space with 360 degree sound in any space. 3LONG LASTING TIME: Bluetooth speaker has a built in 450mAh lithium battery, supports USB charging, easy to charge and use, long lasting time. 4SOUND INPUT: Wireless Bluetooth speaker supports AUX, USB and memory card sound input, you can play your favorite MP3 songs. 5COMPACT AND PORTABLE: Portable Bluetooth speaker is small and lightweight, does not take up too much space and weight, easy to carry and use.