HT3100 digital handheld tachometerDetailed product description：

Product Introduction

HT3100/4100 digital handheld tachometer

Japanese ONO SOKKIHT-3100 contact tachometer
Low range 1.5~2000rpm
High end 15~10000rpm
Low precision ± 0.2rpm
High end ± 1rpm
Display a five digit LCD and hold for 1 minute
Power supply: 3 No. 7 dry batteries

Technical specifications of HT3100 digital handheld tachometer product

range	30～50000rpm
Precision	±1rpm～ ±4rpm
display	Five digit LCD, hold for 1 minute
measure distance	20～300mm
Power supply	3 dry batteries of size 7