4pcs Brake Fluid Tester Pen Automotive Diagnostic Tool Vehicle Liquid Tester with 5 LED Mini Indicator 0V on a clearly digital

0V on a clearly digital display which could also detect and show the resistance of attached atomizer

well built and comes with a large OLED screen that gives much more detail than usual mods such as working wattage

which shows the excellent quality

Protect ULEFONE I9 smart watch from water (Not for swimming or taking a shower)

NFC Connection

4pcs Brake Fluid Tester Pen Automotive Diagnostic Tool Vehicle Liquid Tester with 5 LED Mini Indicator 0V on a clearly digitalProduct Features: Operation Guideline: 1. Unscrew the brake fluid reservoir, and pull off the cap of the Brake fluid tester pen. Dip the test probes into the brake fluid up to the plastic rim of the device. 2. Press the button for power on, green LED will light up. Insert the tester into reservoir for one second then the tester result will be correctly indicated by LEDs. Repress the button for power off. The tester will automatically power off after