1. Use advanced digital audio signal processing technology (DSP) and FM phase-locked loop modulation technology(PLL) makes the sound quality more realistic, the performance more stable, and the working frequency has no deviation for a long time.The reception signal is good, 22 stations can be received locally 2. The LCD display is more intuitive and accurate, with very low power consumption and little noise interference. 3. It has the function of automatically searching for radio stations and storing radio stations, and is easy to operate. 4. Built-in 30-level digital volume adjustment, which can be easily completed by pressing buttons. 5. Automatically remember the data before the power outage when the power is off. Using quartz crystal to stabilize the frequency, the emission frequency will no longer drift when the temperature changes. Full frequency band (76-108MHZ) automatically searches for signal frequency bands and stores memory Built-in rechargeable carp battery and charging circuit, you can charge it with a mobile phone charger, the charging light is bright red light, full of bright green light; Work Voltage:DC 3.0V~5.0V Output impedance:8ohm Output power:5W Output channel:Mono for speaker and Dual channel for earphone (Ordinary 3.5mm diameter stereo headphones can be used, but if you purchase one with a shell, Please note: the diameter of the headphone handle must be less than 7mm! Otherwise, it will not be inserted.) Frequency:87.0MHz~108.0MHz(Disable Campus Broadcasting Band) Frequency:76.0MHz~108.0MHz(Enable Campus Broadcasting Band) Equivalent noise: greater than equal 30dB Battery model: 18650 Battery capacity: 1000MAH, fully charged can last about 7-8 hours Work Temperature:-40℃~85℃ Work Humidity:5%~95%RH Note: It's diy kits. Need to solder by yourself. Colour:Photo Color Material:PCB+electronic components type:A:Kit+lithium battery(Lithium battery: random color, don't accept the specified color)+speaker /B: Kit + lithium battery(Lithium battery: ra