Features1.BASS: The diaphragm on the back has a woofer function that emphasizes bass and achieves a rich sound. Supports 3W rated power.2.WIRELESS 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.3.LONG LASTING TIME: Bluetooth speaker has a built in 450mAh lithium battery, supports USB charging, easy to charge and use, long lasting time.4.SOUND INPUT: Wireless Bluetooth speaker supports AUX, USB and memory card sound input, you can play your favorite MP3 songs.5.COMPACT AND PORTABLE: Portable Bluetooth speaker is small and lightweight, does not take up too much space and weight, easy to carry and use.specificationItem Type: Bluetooth SpeakerMaterial: ABSRMS: 3WSound Input: AUX, USB, Memory CardFM Frequency: 87?108MHzBT: 5.1Distance: 10m/10.9ydBuilt in Polymer Lithium Battery: 450mAhCharging Interface: Type C DC 5VMemory Card: Maximum Support 64G (not Included)PackageList1 x Bluetooth Speaker1 x Charging Cable1 x Carrying Strap1 x Sound Cord1 x Instruction Manual