Specification: Item Type: Cycling Bluetooth Speaker_x000D_Material: ABS, Silicone, Mesh_x000D_Rated Power: 8W_x000D_Working Voltage: 5V 1A_x000D_Waterproof Grade: IP67_x000D_Bluetooth Version: 5.0_x000D_Support Memory Card: 64G (Maximum)_x000D_Built in Lithium ion Battery: 2200mAh_x000D_Battery Model: 18650 Features: 1[High Definition Surround Sound] Bike speaker's 8W large speaker independent diaphragm, no loss of HIFI, and immersive hearing. Built in 2200mAh high capacity battery, long battery life. 2[Outdoor Waterproof] Silicone material, comfortable hand feel, IP67 protection rating against rain, dust, snow and spills. Get great sound at home, on the patio, or anywhere else. 3[2 Playback Modes] Meet your daily connection and playback needs. TF card connection, Bluetooth connection, Bluetooth 5.0 upgrade chip, Bluetooth 5.0 multi device compatibility, free hands. 4[True Wireless Stereo Interconnection] The two speakers enter the Bluetooth pair state at the same time (make sure that the Bluetooth is disconnected from other devices), and you will be able to enjoy your favorite songs anytime, anywhere. 5[Comes with Car Mount] Comes with a bike mount for easy mounting on your bike's frame for enjoyment on the go, and a carabiner for maximum portability in a lightweight design. You can take it with you when you travel outdoors. PackageList: 1 x Bluetooth Speaker 1 x BikeMount 1 x USB Charging Cable 1 x Carabiner 1 x Chinese and English Manual