1. 2.5-400M network cable length measurement (applicable to RJ45 8-core or 4-core network cable, telephone line, BNC video cable) 2. Crystal head crimping test to determine whether cable is crimped and connected 3. Cable mapping function can test the open circuit, crossover, short circuit, etc. of cable 4. Noise-free digital line search, quickly find the target line, with sensitivity adjustable 5. POE test, polarity judgment and voltage value display, applicable to standard, non-standard/IEE802.3AF/AT 3.2-inch color LCD display, clearer input indication The model ET623 comes with multi-function multimeter function The host uses lithium battery for power supply, which is more environmentally friendly Network Cable Tester Digital Tracing: Digital mode (ET622) Length Accuracy:2% ±1m Enter Connection Prompt :Support Cable Mapping :Normal/Open/Short/ Switch Flash: 10/100/1000 Mbps Breakpoint Measurement: Supported Voltage (battery) test: ET622:1-60V(±2% or 0.5V) NCV Testing Sensitivity :Adjustable Digital Tracing Sensitivity :Adjustable Flashlight lighting: support POE Test: Voltage/polarity Low battery detection function: support Auto Power Off: Support Power supply: 1250mAh (Host) rechargeable lithium battery(included)/ 1 x 9V(receiver)battery (NOT INCLUDED) ET622 Color: As Shown Material: plastic Package Contents: 1set x multifunctional network line locators Only the above package content, other products are not included. 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.