Contact Pro CP-2100 Contact Standard Dog Tracking Kit With Bark Indicator (Free Shipping!) is the most accurate radio directional finder on the market. Operating on the only band the FCC has dedicated for radio location of 434-434 MHz allowing for exact location of your dog(s) without the noise found at lower frequencies offered by competitive systems. Systems include 1 collar transmitter, 1 receiving unit, instructions, batteries and a limited lifetime warranty: Features: Receiver- The Contact Standard receiver is built to withstand the rigors of any hunting excursion including any water you may encounter. The Contact Standard series also offers great tracking capabilities on the same frequency range of 434-435 MHz with 100 available built in channels. While still directionally accurate the Contact Standard receiver offers two fewer antennas than the Pro Series. If you are looking for directional accuracy without the pinpoint detail and option flexibility of the Pro series the Contact Standard series is for you.