Vibrating Dog Collar No Shock - 3300ft Dog Training Collar with Remote for 10-120lbs Small Medium Large with Beep Vibration Ultrasonic Modes Security Lock & No Prongs

Is the ultrasonic mode safe for my dog's hearing? Yes, the ultrasonic frequency is specifically designed to be safe and humane for dogs. Is the vibration strong enough for stubborn large breeds? Yes, with 9 adjustable levels, it works even for strong-willed dogs. How do I pair multiple collars to one remote? Each collar can be individually synced to the remote using the channel settings—follow the manual for easy setup. How long does the collar battery last on a single charge? Up to 20 days with typical use, depending on mode and frequency. What’s included in the package? includes Remote Transmitter *1, Receiver *1, Nylon Collar Strap *1, USB Charging Cable *1, Lanyard *1, User Manual *1