Version: Measures the angle electronically and displays it digitally. The measuring computer can be calibrated in seconds in both horizontal and vertical positions. It can also be used conventionally with a horizontal and vertical bubble level. Very long operating time due to large battery capacity. Robust, powder-coated 4-chamber profile with 2 milled measuring surfaces. Delivery includes: Battery No. 081551 6LR61, in a sturdy, transparent plastic screw tube.