Connected Detector -um34/um34c voltage current tester battery meter usb 3.0 lcd um34 Highlights generic brand um34/um34c voltage current tester battery meter usb 3.0 lcd um34 Description: 1.44 inch LCD display, the function is released. Support Chinese and English conversion. Support Android 5.0 or above system, just download APP from mobile phone to detect, USB charging real-time monitoring will indicate, voltage, current, capacity, etc. The screen supports four-way rotation to meet the needs of different working directions. Search "help" for operational issues. specification: Size: 7x3x1 cm / 2.75x1.18x0.39 inch Input voltage: 4-24.00V Input current: 0-4.000A Model: UM34 Measurement range: 4-24 (V) Specification: UM34 (not Bluetooth communication), UM34C (including Bluetooth communication) Package includes: 1 USB voltage current meter Note: Some Android phones have compatibility issues with the product's Bluetooth card. Please be careful to buy.