The Upland Special G2 EXP Remote Trainer Collar is ideal for those looking for a remote trainer and remotely controlled beeper collar in one and have multiple dogs to train. This system can be expanded to accommodate up to three dogs. The waterproof transmitter’s updated design is slimmer and features 18 levels of momentary stimulation six levels of continuous stimulation audio tone improved grip area and low battery indicator. The beeper offers five sound options volume control LED and can easily be heard from up to 400 yards away. Now two-thirds of its former size and weight the collar receiver is more comfortable for dogs. Both transmitter and receiver are made from Lexan and operate using quickly rechargeable batteries. Effective at distances of up to 1 mile under optimal conditions.