The Valoinus Dog Bark Collar is an adjustable sensitivity and intensity level collar that helps reduce unwanted dog barking. The collar features a built-in rechargeable lithium battery that reaches 14 days of standby with charging time of 2 hours. The waterproof and lightweight design allows your dogs to run or play indoors and outdoors under any weather conditions. The anti bark collar is designed with 4 adjustable sensitivity levels (0, L, M, H) and 3 anti-barking modes (beep, vibration, harmless shock).