3300ft Remote & Through-Wall Antenna: Our dog training collar is delivered with a 1100yards (3300ft) control range, making it be freedom train indoors or in backyards without any delay to receive a signal, no more shouting and chasing to have a good boy! | 3 Separate & Adjustable Training Modes: Our shock collars offer 3 humane operation modes, Beep (1-8), Vibration (1-16), and Safe Shock (1-99), allowing you to train dogs in accordance with their aptitude by choosing the best appropriate mode level, correcting bad behaviors in time. | IP67 Waterproof and Compact Receiver: The dog shock collar is designed with totally hermetic technology, freely enjoying showering, swimming, and stream-trekking. As well as the lightweight and compact size, great for puppy small, medium, and large dogs without any burden. | Security Lock & Dual Channel: The e collar for dogs training is equipped with independent buttons on the ergonomic remote to operate separately, prevent misoperation and accidental shock, as well as switch Channel 1 or 2 clearly to train 2 dogs simultaneously. | Quick Charge & Ultra Last Long: The electric dog collar can last up to 15-60 days after 2-3 hours of charge, easy to charge with our car charger or power bank, without worrying about being out of power when we are running or camping with dogs.