[Effective and safe training modes] The dog shock collar training collar has 3 training modes to choose. Beep (5 different sounds), Vibration (adjustable 1-9 levels), Shock (adjustable 1-30 levels) help you solve an uncontrollable dog's behaviour problems.Start low and find the best mode per your dog’s temperament. [4000FT Remote & 4 channels] The remote has a range of up to 4000ft，Indoor and outdoor training can be easily realized.One remote can connect up to four channels to train four dogs, can't train four dogs with one click, you can only control one channel at a time, but you can switch channels at will [IPX7 Waterproof & Security Lock] The IPX7 waterproof collar is convenient for dogs to play by the sea, in the pool or in the rain,The security keypad lock prevents accidental sending of incorrect commands when carrying the remote control. [Quick Charging & Long Battery Life] Both the remote and receiver can be fully charged in 2 hours and have more than 60 days of battery life