High Probe Audio-Visual Alarm HD 3 Colors Backlit Multiple oil type detection: DOT3, DOT4, DOT5.1 Flashlight Data Hold Model: HT663/HT663L Moisture Detection: 0-4%, Resolution 0.10%, Accuracy ±0.3% Brake oil type: DOT3, DOT4, DOT5.1 Display: LCD Auto Power Off: Yes Low battery indication: Yes Trichromatic backlight: Yes Flashlight: Yes Buzzer alert: Yes Power supply: 2x1.5V AAA batteries (The battery is not included in the product) Tips: 1. Before testing, the metal probe is clean. Fully immerse the metal part of the detection head into the tested liquid for 3 seconds. Wait until the display stabilizes, observe the status, and then read the measurement value. 2. It's essential to protect the metal probe. , scratches, or oxidation on the metal probe can potentially affect the accuracy of detection. After testing one typeof liquid, please clean the probe thoroughly to avoid potentially affecting subsequent test results. Color: As Shown Material: plastic Package Contents: 1 * Brake Fluid Tester 1 * English instruction manual 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.