CL-93 Portable Bluetooth Speaker Bluetooth, Pend Drive, Radio & Memory Card Wireless Rechargeable Camping Speaker Driver Unit : 5.25” 2Ω Battery : 1200mAh 3.7V Charging Voltage : USB 5V SNR : ≥60dB Frequency Response : 90Hz-20KHz THD : ≤0.3% (1KHz 1W)