Introducing Sicneka Wireless Bluetooth Speaker Dual Mega Bass delivers full sound with dramatically deeper lows than you’d expect from a speaker that fits in the palm of your hand. And because it’s wireless and ultra-compact, it’s easy to take it anywhere. With the built-in speakerphone you can take calls out loud with clear sound. And voice prompts make Bluetooth pairing easy. The Sicneka Wireless Bluetooth Speaker Dual can play unplugged up to 6 hours and be charged from most USB power sources. How to operate the speaker: 1) Connected Bluetooth, play mobile phone music, need turn up/turn down the speaker volume and mobile phone volume at the same time 2) Last song when short press the button, turn down volume when long press. 3) Next song when short press the button, turn up volume when long press. FM Radio operation: 1) Connect the aux cable(it is the antenna) 2) Adjust to FM model, then will Automatic search.