I saw this deal while browsing for cycling accessories and find it useful. I have purchased other Tacklife products in the past and find them good.

Description
Using Tacklife tyre pressure gauge, you may get the benefits from Making tyres at a correct pressure value:
·Driving safety increased.
·Handling performance improved.
·Save money on tyres.
·Improved on fuel economy.

Advantages:
Accurate and Easy- A simple push button turns the unit on and selects one of four measurement ranges. With gentle pressure, the nozzle seals onto the valve stem quickly and completely to deliver an accurate measurement. After you're done, a 30-second automatic shut off means you never have to worry about accidentally running the batteries dead.

Light at Night- When it's dark, the lighted nozzle illuminates your work area, so you can easily locate the valve stem. The exact measurement instantly displays on a clear, lighted digital screen, so there's no guesswork or estimation like reading an analog gauge.
Ergonomic Design- Contoured to fit your hand, the ergonomic shape is complemented by a soft, nonslip texture for ultimate comfort and control.

How to use:
1. Start the tyre gauge, the LED screen will display"8.8.8",then you can switch 3 kinds of measurements by press the start button.
2. Quickly press the pressure measuring nozzle into the tyre valve, keeping the air not leak for 2s, then pull out the nozzle and read the value.
3.This device will automatically shut down in 30s
Note:You should reset the LED into 0.0.0 before every measurement

Package
1*Digital Tyre pressure Gauge
1*User manual