O8K BT-824 8 inch 10W 3.7V Rechargeable Bluetooth Wireless Speakers Blue tooth Wireless Portable Speakers

Wireless transmission rang: up to 10meterMax memory support(USB/SD): 32GBFrequency response: 100Hz-20KHzSignal to noise ratio: >=85dBFM scan rang: 87.5-108.0MHzUSB charging: DC5VSpeaker drive size: 8″Battery capacity: 2400mAhCharging time: 4 hoursOutput power: 20WSize: 261×256×366mm