Compatible For 18v-20V Battery(Battery not Included) Effortless Connectivity: The speaker supports two types of connection. Bluetooth 5.3 ensures rapid & stable pairing with your devices. A strong connection is guaranteed up to 52 ft. USB audio source is also supported. Simply plug the USB disk into the USB-A port for music playing. Compact Size + Astonishing Sound: Come with a compact size, provide strong sound at the same time. With a press of a button, the speaker will liberate deep, rich, and clear sound with zero distortion through the 20W built-in speaker. It's small and light enough to take it with you anywhere! Dual Speaker Connection: The speaker supports the TWS function which enables two Bluetooth speakers to be connected simultaneously. Let's create a different atmosphere full of enjoyment! Whether at work, camping, or anywhere you need it for! Ultimate Play-Time: The speaker utilizes an external battery pack which offers much more battery life than a normal built-in battery. Moreover, it can be your power bank when you need charging while playing music. Low Voltage Protection: Your battery is our first concern. The speaker will automatically shut down if the battery voltage is below 14.4v to prevent any overload damage. color:red Material:ABS Package Contents: 1 X Bluetooth Speaker Camping(Batteries not included) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.