1. High quality material, prevent the failure of the key after long-term use, protect the circuit board solder pad from oxidation, improve the PCB conductivity, reduce impedance and contact resistance. 2. button to set voltage or current, one key to enter, one key to exit, fast and simple, refuse cumbersome. 3. With 1.8 inch large color screen display content more intuitive, more simple operation Settings. 4. Silicone button material is soft, comfortable to touch, feel excellent. Can withstand long time use and frequent press, without wear or failure, more , longer service life. 5. Input voltage: 7-36.00V; Output voltage: 0.5-40.00V; Output current: 0-8A; Output voltage accuracy: 0.3%+3 words (Calibratable); Output power: 150W; Output current accuracy: 0.5%+3 words (Calibratable) Voltage resolution: 0.01V Current resolution: 0.001A Data group storage: 11 groups Silicon rubber keypads: 5 Screen size: Upgraded 1.8-inch large screen, 36x29mm visible range Buzzer: Yes Conversion efficiency: About 88% Soft start: Yes Protection mechanism: Input anti reverse connection: Yes Output anti backflow: Yes Input undervoltage protection (LUP): 6.0-40V adjustable, factory default value of 6.0V Output overvoltage protection (OUP): 0.5-42V adjustable, factory default value 42V Output overcurrent protection (OCP): 0.001-8.2A adjustable, factory default value 8.2A Output overpower protection (OPP): 0.1-180W adjustable, factory default value 160W Over temperature protection (OTP): 30-99 adjustable, factory default value of 60 Timeout protection (OHP): 1minutes - 99 hours and 59 minutes, factory default off Overcapacity protection (): 0.001-9999Ah, factory default off Superenergy protection (OPH): 0.001-4000KWh, factory default off Note: Due to different production batches, there are differences in printing/appearance, which does not affect use. Colour:Black Material:Plastic + Silicone Package Contents: 1 * DC DC Buck Boost Converter 1 * Bluetooth transparent transmission module with cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.