Highlights: Output power: 5W Frequency response: 90hz – 20khz Signal by noise ratio: 80 Decibels Power supply: 5V adapter Impedance: 40hms FM: 87.5 – 108mhz Product Description: Flashlight function Wide Coverage, Sound Support TF Card and USB Support Bluetooth connection function Replaceable 18650 batteries. long lasting battery life more convenient to use. M key: In the TF card core mode, short press the M- key to switch between TF card or USB Mode: Long press M to enter recording mode. What’s in the box: 1 x Portable Speaker Weight: 0.3 SKU: 201108161955