800 YARDS REMOTE GUIDE DOG CONTROL TRAINING COLLARS | WT617Main Features1.Patent design, Up to 880 yard remote range2.receiver vibration + receiver and remote vibration + receiver static shock3.Adjustable 100 levels of each models4.Rechargeable and waterproof with LCD display with back-light5.ON/OFF button on receiver and remote controller.6.Special receiver and remote vibration function let you feel the vibration levels by hands.