1. Material: plastic + waterproof cloth mesh 2.IPX4 waterproof 3. Built-in 2000 mAh battery 4. Support wireless stereo TWS (True Wireless Stereo) 5. Built-in MIC, can answer calls 6. Double diaphragm, enhance bass effect Power supply: built-in lithium battery Power: 6W*2, stereo Bluetooth solution: Actions 4.2 Audio input: wireless + wired audio input Connection distance: 20 meters barrier-free Playing time: about 10 hours Speaker size: 45mm Product size: 178(L)*77(W)*67(H)mm