1. Supports 2CH 50W sound2. Support SD， USB to play music， radio support FM87.5-108.0MHz3. Built-in digital display tubes， easy to use4. Support for external signal switch directly， USB / SD card directly automatic or remote control switch5. Use high-fidelity imported TDA series chip， rich sound， low distortion Color: black + silverMaterial: metal + electronic componentsPackage size: about 16 x 11 x 5cmProduct size: about 15.5 x 10 x 4.5cm ( overall dimension )Interface: SD / MMC card slot， USB interface， power port， REM input interface， audio interfaceBasic parameters:1. Working voltage: DC 12V2. Frequency response: 20Hz-20kHz3. SNR: 85dB4. Height control: 12dB + 10KHz Bass control: 12dB + 100Hz Signal level: 220 MV 47 K5. Frequency: 87.5-108.0MHz Package:1 x Hi-Fi amplifier1 x Remote control ( with battery )1 x Signal induction line1 x English user manualIn color box package