How-To Activate Glow-in-Dark DialStep 1... Expose dial face directly to any bright ambient lightsource for a minimum of ten seconds.* Common sources: flashlight app, interior light, headlight,sun, tire inflator light, etc.Step 2... See for yourself Dial will remain illuminated for fiveto ten minutes for easy use in low light conditions 1. 2,5- , , , , 7 / 100 , , , . . 2. 360 , , . . , , . 3. , , ; , . 4. , , , , ANSI Grade B40.1, , , . 5. . , . Bourden Tube Mechanic Tyre Pressure GaugeATsafepro Analog Tyre Pressure Gauge come with a bourden tube mechanism, No batteries required which can promise it reliable in all weather conditions; Also accuracy certified with ANSI Grade B40.1 Grade B. Keeping a good performance for yearsLegible 2.5 Double Scale Glow Dial Features Accurate Scale Marks, Quick and Easy ReadingLegible 2.5 double scale dial which is larger than most of the standard 2 dial among the marketing; Pressure range 7 bar or 100 psi. Clear display, easy to read even in the dark conditionStrong Hexagonal Stem with A Large Air-Bleed ButtonThe mechanical tyre pressure gauge has a heavy duty structure. It is equipped with a more sturdy Hexagonal Stem integrated with a cozy deflated button so that promise a accuracy pressure holding when checking. Beyond that, we can also use the button to make a little adjustment of the tyre pressure360Degree Angle Swivel NozzleThe car tyre pressure gauge has a 360degree chuck with a 40 cm long air hose which are suitable for any sizes vehicle tyres. Very easy to operate and attach the tyre valve stem in any directionErgonomically Design Plastic GripATsafepro Dial Tyre Pressure Gauge is designed with a ergonomically rubber grip which ensure you will have no discomfort when pressing the chuck on the valve stem. A good feeling every time you checking the tyre pressure and no more hurts by the connect parts