1. Built-in 3.7V 1400mAh lithium battery, with long battery life 2. The tester has a DC 60V input protection design to prevent non-standard equipment from outputting voltage and damaging the instrument 3. Type-C charging interface, more convenient for USB charging 4. It can perform NCV non-contact electrical testing and has an auxiliary lighting function 5. Network crystal head crimping test: No need to connect the other end, just insert into the test socket to quickly measure the result. Wire crimping, just insert it, and you will know the crimping effect. There is no need to cut off the crystal heads at both ends anymore 6. Port flashing: Connect to the network switch, enable the port flashing function. The switch port indicator light flashes approximately every 3 seconds, quickly finding the interface of the wire on the switch 7. Interference signals and normal signals can be switched freely, convenient to use 8. Suitable for network wiring, network maintenance and fault troubleshooting, etc 9. Settings available for backlight activation time, automatic shutdown time, etc 10. Can be connected to ordinary network switches and PoE switches for power line tracing 11. Optional languages: Chinese, English 12. Dimensions: Transmitter: about 12.5 x 7 cm; Receiver: about 5 x 19.8 cm Packaging List: - Launcher x 1 - Receiver x 1 - RJ45 interface network cable x 1 - RJ11 interface telephone line x 1 - RJ45 crocodile clip cable x 1 - RJ11 crocodile clip cable x 1 - Type-C charging cable x 1 - Headphones x 1 - Instruction manual x 1 - Tool kit x 1 - Color box x 1