Digital Tachometer Tachometer Handheld RPM Meter Speedmeter W2V4

Resolution: 0.1RPM (2.5~999.9RPM), 1RPM (1000~99999RPM). Sampling : 0.5s (over120 RPM). Product Weight: 93g / 3.28oz. Storage Humidity: 10%~75%RH. Storage Temperature: -10℃~60℃ (14℉~140℉).

eBay