It can be used as a USB tester or as a DC voltmeter. It is a high-end product created by the wisdom of the industry!<br> UD24 2.4 inch USB tester DC5.5 type-c digital voltmeter ammeter power bank voltage detector volt QC PD electric meter for APP<br> Voltage measurement range: 5V ~ 32.0V<br> Current measurement range: 0.00 ~ a<br> Synchronization time: 999 hours 59 minutes 59 seconds<br> Input interface: Type C / Micro-USB / USB<br> Output interface: Type C / USB<br> Time charging reminder setting: Countdown 24 hours any set value<br> USB D + voltage range: 0V ~ 2.99V<br> USB D-voltage range: 0V ~ 2.99V<br> Update time: more than 500mS / times<br> Measurement rate: about 0.5 times / sec<br> Alarm mode: siren sound + double display warning warning<br> Display type: 2.4 high cost true color digital display large screen with Chinese and English measurement interface<br> Self-consumption current: less than 0.02a<br> Working temperature: -10 ~ + 60℃ -10 ~ + 60℃<br> Operating humidity: 10 ~ 80 (no doubt) 10 ~ 80 (no doubt)<br> Working pressure: 80 ~ 106kPa<br> colour: black<br> Material: ABS<br> size: 125x59mm<br> Package Contents:<br> 1 x UD24 teter<br> Only the above package content, other products are not included.<br> 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.