Prestaflator Digital Gauge for Air Compressors and Floor Pumps ACCURACY - 0.5 PSI accuracy between 1 and 100 PSI. 1.0 PSI accuracy between 100 and 300 PSI. FEATURES - Use it to deliver pre-set pressure from your compressor. FUNCTION - Auto-off and Auto-on function (detects pressure change when not in deep sleep). COMPATIBILITY - Uses standard 1/8" threads common on many Air Compressors. QUALITY: Prestacycle isdedicated to putting new ideas and innovations in the hands of cyclists. As life-long cyclists, we understand its about riding and actually being on the ride. We make products to do the right job quicker, and give you more time in the saddle.