If you hunt upland game birds and own up to three bird dogs, then check out the versatility, performance and expandability the SportHunter SD-1825 training system package offers. This package comes with one transmitter and one receiver (additional receivers sold separately) that give you a full range of training options in a compact design. Control your dog with confidence with up to 16 levels of stimulus. Plus, you can choose to send momentary or continuous corrections. Build a custom training system to achieve the best results from your dog using vibration and tone pulse options. The waterproof DryTek transmitter and receiver are submersible down to 25 ft. The SD-1825 gives you up to one mile of transmitting range. A slim-profile collar receiver ensures a perfect fit. The compact transmitter is ergonomically shaped and easy to hold. Unit expands to three dogs using SportHunter SDR-A 1825 Add-A-Dog receivers. On and off switch on receiver. Operates on lithium-ion batteries. Comes with a convenient docking station that fully charges the receiver in just two hours. Package also contains adapter, test light, belt clip, lanyard, long contact points, operating guide and basic training DVD and manual. Color: Black. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Electronic Collars.