Features: brand new and high quality FCOP: Full-power Cut-off (ON / OFF), you can set it yourself when the power is < 1W for 1 minute, it will-power cut off. TC: Timed charging (ON / OFF), you can set the for time period of 01:00-24:00 to charge regularly, when it reaches the setting, it will automatically cut off. Overcurrent protection: you can set the range of 0.0A-5.1A by yourself. Over voltage protection: 01V-36V range can be set by yourself. Low voltage protection: 00V-35V range can be set by yourself. Specifications: Voltage measurement range: 5V~32.0V Current measurement range: 0.00~ 5.10A Timing time: 999 hours 59 minutes 59 seconds Input interface: Type-C/Micro USB/USB Output interface: Type-C/USB Timing charging reminder setting: countdown 24 hours any set value USB + voltage range: 0V~2.99V USB - voltage range: 0V~2.99V Refresh time:> 500mS/ times> 500mS/ times Measurement rate: about 0.5 times/s Alarm mode: sound + display prompt double warning Display type: large screen with true color-digital display with heavy cost 2.4 Chinese English measurement interface Self-consumption current: <0.02A Working temperature: -10~+60°C -10~+60°C Working humidity: 10~80 (no doubt) 10~80 (no doubt) Working pressure: 80~106kPa Size: approx. 125x52x15mm/4.92x2.05x0.59in Package Includes: 1PC x USB Tester note: No retail package. Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!