Bluetooth Speakers Mini Portable Bluetooth Wireless Speaker Colorful LED Light Subwoofer HIFI Speaker Support USB,TF Card, AUX, FM Inputs Size specification: 2.83 Inch Radius, 4 Inch Height. Feature: portable, powerful bass, Led light, Built-in Rechargeable Battery. Impressive Audio: Driver That Deliver Powerful Sound, Perfect For Outdoors, Home, Dorm Room, Kitchen, Bathroom, Car, Or Parties. The Speaker S1 is mini size of the model BT60 (ASIN: B01E74Z9SW). The same powerful tone quality with a plain packaging, it is more affordable and convenient for carry, with its simple button and LED light you can control it easily. There is no instruction in the package, please read the direction for use: press the volume button for about 3 seconds, you can switch mode between Bluetooth, AUX and FM radio. Turn it right or left could adjust volume.