Especially suited to upland and multi-dog hunting situations, the fully customizable SportHunter 1825 puts you in confident control during the hunt. Features up to 16 stimulus levels and a choice of continuous or momentary (nick) correction. Ergonomic, slim-profile collar receiver ensures a perfect fit. Easy-to-handle compact remote transmitter has a one-mile range. Vibration and tone options further help you build a customized remote training system to guarantee the best performance from your dog. Easily expandable to control up to 6 dogs by adding SportDOG Brand Add-A-Dog collars (sold separately). Designed with DryTek waterproof technology. Convenient docking station charges system in 2 hours. Includes: remote transmitter, belt clip, collar receiver, lanyard, charging cradle, long contact points, extra collar strap (orange), operating guide, adapter, training DVD and manual, and test light. Transmitter dimensions: 6.75" x 2" x 1". Transmitter weight: 5.1 oz. with battery. Receiver dimensions: 3.5" x 1.5" x 1.5". Receiver weight: 2.6 oz.