Self Powered Totalisers Trumeter bi-directional totalising counters offer a premium feature-packed product which is cost-effective. Offers simple installation thanks to screw connections located on the back of the unit 8 digit LCD display with 9mm character height Front reset function can be disabled to prevent accidental or un-approved resetting Front panel can be sealed to IP65/NEMA4X Typical uses are where external power is not readily available - event counting, position, length, rotation and distance measuring applications Provides the user with a viable alternaltive to an electro-mechanical counter 7111HV ( RS Stock No. 815-8359 ) offers an additional feature of permitting triggering from any voltage source between 10-240V AC or 5-110V DC ±10% Note Backlight requires external supply All Trumeter products come with a 3 year manufacturer's warranty