The blue Aesculap Bonum Pro GT644-NB is a cordless large-animal clipper supplied for cattle and horse shearing. This version includes one battery and the GT502 lower comb with GT501 upper cutter. The combination has 31 comb teeth and 15 cutter teeth, with a nominal 3 mm cutting length.

Aesculap identifies several cattle applications for this blade pairing: full clipping of individual clean, fine-haired or short-haired animals, preparation for shows, partial clipping of dairy cows, and tail or udder work. These uses make the machine relevant to livestock owners who need a portable clipping setup for both planned grooming and specific areas of the animal.

A DC motor and spur-gear drive deliver approximately 2,500 strokes per minute. The included 10.8 V, 2,500 mAh lithium-ion battery has a stated runtime of 130 minutes and a charging time of 65 minutes. Battery management switches the machine off if the battery temperature exceeds 50°C, allowing it to cool before operation resumes. The charger uses two LED displays to communicate battery status.

The body measures 295 mm long, with a grip diameter of 40 mm and a working weight of 920 g including battery and blades. Its slim grip and balanced layout help with positioning during clipping. A recessed electronic push button helps reduce unintended switching while the machine is being handled.

The set includes the clipper, one GT651 battery, charger, power pack with interchangeable EU/UK/US/AUS plugs, blade pair, GT604 oil, instructions and a plastic case. Follow the cutter-head instructions for lubrication, blade pressure and cleaning so the shearing assembly stays ready for regular use.