The simplicity of a basic electronic training system with rugged construction of an advanced sporting dog model. Completely waterproof transmitter and collar receiver feature SportDOG's exclusive DryTek technology. Compact unit reaches up to 3 yards away to trash-break or fix other unwanted problems. Transmitter allows instant adjustment between eight intensity levels, continuous and momentary modes and a tone-only feature. Long-life NiMH rechargeable batteries provide up to 4 hours of use between charges, and low-battery indicator ensures you're never left with a dead collar or transmitter.