Model TT-032 Type Portable Colors White + Blue Quantity 1 Material Plastic housing Internal Memory No Memory Card Type Support TF card and USB flash drive Max Extended Capacity Up to 16GB Media Format MP3 / MP4 Total Power 3W Impedance 4ohm Signal to Noise Ratio(SNR) 80dB Sensitivity 450mV Channels 1 Interface 1 x 3.5mm jack 1 x 3.5mm line in 1 x Power 1 x USB 1 x Micro SD / TF card slot Radio FM Radio FM Frequency 87.5~108MHz Power Supply Built-in Rechargeable Battery Built-in Battery 400mAh Other Features Built-in seven-color LED light Packing List 1 x Speaker 1 x USB cable (72cm) 1 x Audio cable (40cm) 1 x Strap (18cm) 1 x Chinese / English user manual