Total Output Power: 36 Pure Output Power (RMS): 18 S/N Ratio: ≥ 60dB Speaker Unit: 4" 3Ω x 1 Frequency Response: 90Hz-20kHz Rechargeable Internal Battery: Lithium 3.7V 1500 mAh Power Supply: USB 5V Bluetooth: Yes USB Drive: Yes Micro SD Card Slot: Yes FM Radio: Yes AUX Line-In: Yes 7 Colors Pulsating LED: No RGB Light: Yes Stereo Sound: Yes Volume Control: Yes TWS: Yes Dimension: L165 x W95 x H210mm Weight: 0.7kg