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Tri-Tronics G3 EXP Pro 500 Electronic Dog Collar is field expandable to control up to three dogs (additional collars purchased separately).

Allows easy one-hand operation without taking your eyes off your dog
Compact, tough, and dependable Receiver
2 1/2 in fixed Transmitter antenna with enhanced performance eliminating lost or broken antennas
18 levels of momentary and 18 levels of continuous stimulation
A no-stim ""N"" setting to avoid accidental stimulation
Consistent 1-mile range
Waterproof Transmitter and Receiver
Insulated contact points for reliable performance in wet conditions
Long and short contact points for different coat thickness
Stainless steel contact points minimize neck irritation on the dog
A front located transmitter button activates Tone signal on Receiver
Includes the “A” setting on the intensity dial for remotely activating Beeper and Tracer E-Collar Light using transmitter button
Multi-Dog selection switch colors match collar strap colors to identify dogs being stimulated
Proprietary charging System: Charge indefinitely without damage and fully charge in two hours
Charging Adapters eliminate need for jacks or plugs on Transmitter and Receiver>
Battery life indicator on Transmitter and Receiver so you know when to charge the system
Long lasting rechargeable, user replaceable, NiMH Batteries for Transmitter and Receiver
Easy to access Receiver on/off switch
Durable Carry/Storage Case with Dry Bag to keep Transmitter and charging system separate from wet muddy collars

Tri-Tronics was founded in 1968 they are committed to designing, manufacturing and selling only the highest quality, most durable, reliable and easiest to use electronic dog training collars in the world. Tri-Tronics has pioneered many feature that are now industry standards including: Insulated contact points, momentary and continuous stimulation, the use of tone, multi-dog capability, one-hand operation, quick charge two-hour charge and trickle charge, remote operation of accessories.
The Constant leadership in the industry has made Tri-Tronics the standard by which all e-collars are judged. Every Tri-Tronics product undergoes extensive function testing to verify that it meets or exceeds the standards that Tri-Tronics customers have come to expect and demand.