Digital tachometer ELBRO optical and mechanical

Tachometer ELBRO DT-1236L, with laser function, optical speed range 5...99999 rpm, optical speed resolution 0.1 rpm, optical speed measurement error ± 0.05 %, mechanical speed range 0.5...199999 rpm, mechanical speed resolution 0.1 rpm, mechanical speed measurement error ± 0.05 %, speed range 0.05...1999.9 m/min, optical and mechanical sensor type, 215×67×38 mm, batteries 4×AA LR6