This is our company's flagship product, all materials are used the best, in pursuit of an extreme sound quality and perfect customer demand. The tuning of sound quality is near perfect, allowing the two speakers to release it as much as possible. The battery is 2000 mah, which gives you longer battery life and better listening. It's a good size to hold in your hand. Portable and great outdoors. Function Blustooth, handsfree, TF card, UAUX,TWS, RMS 20W Material ABS+Rubber+Fashion fabric+Silica gel Charging USB Micro Charge DC 5V Color Black, blue,red, Unit size 210*63*114 mm Net weight 742G Bluetooth 5.0 Channel Stereo Speaker 58mm * 10W*2PCS Bass diaphragm 100*50 mm with PV side Distrant >20M Extend <32G Frequency 100Hz-20KHz Battery 7.4V 2000Mah