Fashionable rugby design, cool and stylish With micro SD TF card slot, you can play mp3 / mp4 format files in the TF card. Wireless portable mini Bluetooth stereo speaker system. Saves you from the hassle of tangled wires. This model of speaker supports any mobile device comes with Bluetooth function such as Phone, iPad, Samsung Galaxy/Note/tablet, Laptop, Tablet PC, etc Features: Bluetooth Wireless Volume Control, Integrated Microphone Bluetooth 10 meters transmission Built-in microphone TF card slot/ function FM function Two stereo unit speakers Replaceable lithium battery Specification: Loudspeaker Output: 3W*2 Frequency Response: 150Hz-20kHz Signal to Nosie: >65dB Distortion: <1% Impedance >600Ω Battery Charging Voltage: 5V /- 0.5V Material: ABS plastic Package content: 1x Bluetooth Speaker 1x USB charge cable