The SportDOG Yard Trainer 350 combines the simplicity of a basic e-collar training system with the versatility and ruggedness of a more advanced sporting dog trainer. With up to 300 yards of range, the compact SD-350 is more than adequate for basic training while also giving you the confidence to fix control problems at a distance. The Transmitter allows instant correction-level adjustments, eight levels in both continuous and momentary modes, while a tone feature allows constant communication. The SD-350 is a true all weather system, with a completely waterproof transmitter and collar receiver that feather DryTek technology. Long life NiMH rechargeable batteries are convenient and provide up to 40 hours of use between charges, and a low battery indicator ensures you're never left with a dead E-collar or Transmitter.