1. Display: 1.44 inch color LCD display2. Voltage measurement range: 4-24.00V3. Voltage measurement resolution: 0.01V4. Current measurement range: 0-4.000A5. Current measurement resolution: 0.001A6. Capacity accumulation range: 0-99999mAh7. Voltage measurement accuracy: +/- (0.2% + 1 digit)8. Energy storage range: 0-99999mWh-999.99Wh9. Current measurement accuracy: +/- (0.8% + 3 digits)10. Load impedance range: 0.8ohm-9999.9ohm11. Time measurement range: 0-99h 59min 59s12. Temperature range: -10 degrees Celsius ~ 100 degrees Celsius13. Temperature measurement error: +/- 3 degrees Celsius14. Screen brightness setting: 0-5 level15. Delayed shutdown time: 0-9 minutes16. Voltage graphic range: 4-24.00V17. Current graph range: 0-4.000A18. Product weight: 22.87g (UM34C) /18.39g (UM34) (no packaging); 51.43g (UM34C) /46.95g (UM34) (including packaging)19. Refresh rate: 2Hz20. Dimensions: 71.2mmx30.5mmx12.4mm (UM34C) /71.2mmx30.5mmx11.3mm (UM34)21. Fast charging recognition mode: QC2.0, QC3.0, APPLE 2.4A / 2.1A / 1A / 0.5A, Android DCP, SAMSUNG22. USB port: USB 3.0 port, support OPPO mobile phone VOOC, OnePlus DASH23. File download method:- Download link of user manual and Android APP: http://www.mediafire.com/folder/5c877rc21tp1p/UM34- IOS OS: Search for the UM table in the iOS APP store to download- Android APP: Search UM meters on GooglePlay to download24. Note:- UM34C Type-C port is only used to measure Type-C cable, and does not support all Type-C fast chargers and PD chargers; and there is no type C trigger.- UM34 is not a communication version, and it does not support any communication between PC and telephone in any way. - UM34C is the communication version connected via Bluetooth. And UM34C has no PC software, only Android APP. (The mobile phone android system of some brands is a customized system, and our APP is not compatible, such as for Xiaomi, Nokia and other brands, so please download and test before buying, and purchase carefully)- Mobile APP (Android 5.0 and higher, and IOS 8 and higher. Support 18 languages, Chinese, English and Russian ...)- There are some incompatibility problems between some Android phones and our Bluetooth board, please buy carefully, such as for samsung NOTE8 / S825. For Android and IOS APP:A: The APP only supports android 5.0 and higher and IOS 8 and higher.B: Allow APP to run in the background without cleaning.C: Allow APP to start automatically.D: After the screen is locked, the APP is allowed to stay without cleaning.Specification: Package Weight One Package Weight 0.06kgs / 0.14lb One Package Size 15cm * 12cm * 4cm / 5.91inch * 4.72inch * 1.57inch Qty per Carton 468 Carton Weight 30.00kgs / 66.14lb Carton Size 50cm * 50cm * 60cm / 19.69inch * 19.69inch * 23.62inch Loading Container 20GP: 177 cartons * 468 pcs = 82836 pcs40HQ: 412 cartons * 468 pcs = 192816 pcs