This unit works amazing. Life changer in our home. It comes in slopehill box with manual! brand new collar In package and all new silicone prongs in adjustable sizes. The receiver and transmitter were used less than 6 months. The only reason I’m selling this one is we upgraded to the dual two dog collars when we got our second sheltie. I highly recommend this training collar. We kept it on our dog 24x7

it’s adjustable by just fitting to your dog and then cutting off the excess collar length. Remote has a flashlight too!! It has three different settings. Beep, vibrate (levels 1-99 to increase strength of vibration) same with shock button 1-99 in intensity. Our sheltie is 30 lbs that used it and I ended up keeping vibrate on 75 and shock on 50 which we rarely needed. Im super impressed with these and she was trained in under two days.