(1)Question: What type battery is used in this device?
Answer: One CR2032 3V button battery
(2)Question: does it work 4 wheelchairs?
Answer: It measures the PSI or pounds per square inch of a tubed tire, so if the wheelchair has air filled tires, there is no reason why it wouldn't work.
(3)Question: Does this gauge have a provision to deflate or push-in the needle to let some air out in case of over filling?
Answer: Easy to do. Just turn slightly to misalign with the valve.
1.Designed to maintain correct tire pressure, reduce tire wear and extend tire life
2.Digital display reading instantly and clearly being shown, no longer do the guesswork of analog gauges
3.Lighted nozzle and display screen for ultimate visibility in low light or at night.
4.4 settings with range: 2.0-100 PSI or 0.15-7.00 BAR or 15-700KPA or 0.15-7KG/cm²
5.Non-slip texture makes it easy to hold onto and the ergonomic design is both suitable for men and women's hands
Product size: 14*5.7*2.7cm
Product weight: about 55g
Measuring range: 2.0-100 PSI or 0.15-7.00 BAR or 15-700KPA or 0.15-7KG/cm²
1*Tire Pressure Gauge(other accessories demo in the picture is not included.)
Please allow 1-2mm errors due to manual measurement.
Due to the difference between different monitors, there are color differences, please take the real product as the standard.