[Remote Control] The Dog Training Collar is designed up to a far range of so you can easily train your dog in the yard or park. [Security Lock Button & amp; Memory Function] Safety lock button can protect your dog from unintentional handling. The memory function for the parameters makes it easier to use, it means that it is not no need to reset the collar [Waterproof and Rechargeable] The 100% waterproof IPX7 receiver collar allows you to train your dogs even on rainy days. But please make sure the charging port is closed when the receiver is submerged in water, and please do not put it on in water for a long time. Rechargeable transmitter and receiver can be charged quickly at the same time. Can be used for a long time after a full charge [For Dogs of Different Sizes] The adjustable collar can accommodate dogs of different sizes. & nbsp;