The electronic Best Friend tick repeller is suitable for both cats and dogs. Activate the repeller and attach it to the pet's collar. It works by emitting an ultrasound that disrupts the ticks’ sensory receptors, expelling them. The tick repeller is a completely non-toxic and harmless way to repel ticks and it works for both pets and people! When activated, the battery lasts about 10 months, and it is non-replaceable. Size 2.8 x 1.7 cm. Ticks are a nuisance for pets from spring to late autumn. They lurk in shadowy grass, waiting for the right animal to pass by so they can burrow into its fur to suck blood. As ticks spread nasty diseases, all ticks should be removed from your pet as soon as possible. There are also various ways to protect your pet from ticks before they can attach themselves to the skin.