1. Reliable Mechianical Cycle Tyre Pressure Gauge presta As Christmas gift - Bourden tube mechanism, no batteries required, keep high accuracy and good performance for years; For Presta valve only\n2. Legible 1.5\u2019\u2019 dail with the special chuck for pressure gauge Presta Tyre Valves-Easy to ready , and operate\n3. Pressure range of bicycle pressure gauge presta from 0 to 30psi/ 0 to 2bar \u2013Dual scale with English and Metric,easy to ready for different people,suitbale for mountain bike\n4. Mini size fits handlebar pack or seat pack-Easy to Carry pressure gauge presta\n5. Excellent air valve botton- Durable,for tyre deflation adjustments or reset the dial.There will be small particles stucked the tire gauge if you test unclean tire air, so it can not hold the reading. It's easy to clean it if you screw off the stem, or rotate the button\nWhy Choose Godeson Smart Mechanical Bike Tyre Pressure Gauge for Presta Valves? A professional tool worth having, UNIVERSAL FIT BIKE CAR an!