Brand SENICC Model K510 Type Portable Colors Red + Deep Grey Quantity 1 Material ABS Internal Memory NO Memory Card Type TF card / USB flash drive Max Extended Capacity 64GB Media Format MP3 Total Power 15W Impedance 3ohm Signal to Noise Ratio(SNR) >/=65DB Sensitivity Speaker: 92db microphone:-52db Channels 5.1 Interface 3.mm microphone / 3.5mm audio / TF card / USB 2.0 / Mini USB Radio FM Radio Power Supply Built-in Rechargeable Battery Built-in Battery 1800mAh Plug Type 2-Flat-Plug FM Frequency 87.5~108MHz Other Features 0.8" display screen Packing List 1 x Amplifier 1 x Head-wear micorphone (96cm) 1 x Strap (60cm) 1 x 100~240V / 150mA power adpater (2-flat-pin plug)