300 Yard Rechargeable LCD 100LV Level Shock Vibra Remote Control Pet Dog Training Collar by Molie The Remote Transmitter & the Collar Receiver can be Rechargeable and waterproof. 100 levels of vibration & static(levels can be altered by use of up & down button.) LCD Display The Collar length can be adjustable from 12" to 21" Remote range up to 300 Yards Effective on dogs : 10 to 130 pounds The system can be used for 1 or 2 receivers.