Brand N/A Model N74U Type Mini Colors Black Quantity 1 Material ABS Internal Memory No Memory Card Type TF Max Extended Capacity 64GB Media Format MP3 Total Power RMS20W Impedance 8ohm Channels 2 Remote Type N/A Interface USB 2.0 microphone input port earphone plug power port TF card slot Radio FM Radio Power Supply 7.4V Built-in Battery 2000mAh Plug Type US Plug FM Frequency 87~108MHz Other Features Frequency response: 100~13000Hz; Consuming current: 150mA; Can use for 15 hours after fully charged; Can connect to MP3 / MP4 / cellphone and computer etc. Packing List 1 x Megaphone 1 x 100~240V power adapter (90cm) 1 x Headphone (99cm) 1 x Audio cable (60cm) 1 x Chinese / English user manual 1 x Waist belt (66cm)