It can be used as a USB tester or as a DC voltmeter. It is a high-end product created by the of the industry! UD24 2.4 inch USB tester DC5.5 type-c digital voltmeter ammeter power bank voltage detector volt QC PD electric meter for APP Voltage measurement range: 5V ~ 32.0V Current measurement range: 0.00 ~ a Synchronization time: 999 hours 59 minutes 59 seconds Input interface: Type C / -USB / USB Output interface: Type C / USB Time charging reminder setting: Countdown 24 hours any set value USB D + voltage range: 0V ~ 2.99V USB D-voltage range: 0V ~ 2.99V Update time: more than 500mS / Measurement rate: about 0.5 / sec Alarm mode: siren sound + double display warning warning Display type: 2.4 high cost digital display screen with Chinese and English measurement interface Self-consumption current: less than 0.02a Working temperature: -10 ~ + 60℃ -10 ~ + 60℃ Operating humidity: 10 ~ 80 () 10 ~ 80 () Working pressure: 80 ~ 106kPa colour: black Material: ABS size: 125x59mm Package Contents: 1 x UD24 teter Only the above package content, other products are not included. Note: Light 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.