This bark-deterrence collar has an auto-rise setting that automatically adjusts the correction level to stop unwanted barking. Accelerometer bark-detection technology eliminates nearly all false corrections, making it safe for your dog. Or you can manually set the correction level according to a certain number of barks with the Bark Odometer™. Integrated stainless steel contact points work on all breeds and coat thicknesses. Compact and lightweight. Rechargeable 3.7-volt lithium-polymer battery runs for up to five months on one charge (included; user replaceable). Charger included.