Holding Rod for BeeSpi V Light Gate-Measure speed and acceleration in an instant with the BeeSpi V. Unlike traditional tape-based velocity measuring experiments that are hard to set up and can be inaccurate, BeeSpi V uses advanced light gate technology to instantly measure the speed of an object. Using multiple BeeSpi V Light Gates you can easily calculate acceleration of an object. This provides additional class time to analyse the results of the experiment, as well as helping students improve their understanding. Power Source: two size AAA batteries (sold separately) Specially designed holder enables your BeeSpi V to be fixed at the desired angle or height depending on the experiment you wish to carry out.