产品描述：
Electronic Tachometer
Precise red LED light source (laser beam) together with a reflective strip, non-contact measurements can be made safely up to 40cm (153/4?) from the target.
For measuring in rpm and rps.
Testing range:
100 to 30000rpm/1.7 to 500rps.
6 digit clear LCD display with optional back light. Data hold function. Auto power ?OFF? & low power indicator. Battery operated: DC1.5V 3x AAA (included).
Conforms with EN61326-6: 2006 and EN61326-2-2: 2006.