Brand N/A Type Portable Colors Red + Black Quantity 1 Material Plastic Internal Memory No Memory Card Type Micro SD / TF Card Max Extended Capacity 16GB Media Format MP3 Total Power 3W Impedance 4 Signal to Noise Ratio(SNR) 75dB Sensitivity 500mV +/- 50mV Channels 2 Remote Type N/A Interface 1 x 3.5mm audio input port 1 x USB 2.0 charging port 1 x Micro SD / TF card slot Radio FM Radio FM Frequency 87~108MHz Power Supply 220~240V Built-in Battery 500mAh Other Features Supports Micro SD / TF card USB flash drive FM etc; Supports Line IN function receiving the audio source from MP3 / MP4 player PC Notebook etc; Built-in high sensitivity FM radio frequency module the signal is excellent; Elegant and stylish in appearance compact and portable; 3.5mm AUX; 3.5mm audio output; FM Radio; Searching the channels automatically from 120Hz~18kHz; Size: 14 x 7 x 5.7 cm; Net weight: 175g; Battery: external battery Packing List 1 x 3.5mm Audio cable (40cm) 1 x USB Charging cable (40cm) 1 x Rechargeable Lithium battery