Key : Switch : Power On / Off Sleep Timer : 15 Mins / 30 Mins / 60 Mins Bluetooth : V5.0 Hands - free with microphone Music Streaming playing R.Frequency : 65HZ - 18,5KHZ S / N Ratio 70db Power Output : 15W TF Slot : TF card playback MicroUSB Charging Slot : Max. 5V 1A Built in Lithium battery : 2000mAh Accessories : MicroUSB cable Dimension : 140*168*172mm