Tracks up to 200 dogs, digital display, punch in each frequency number. 1000khz frequency range avoids interference with other signals. Attenuator reduces swamping, noise blanking circuit. Backlit signal meter needle shows signal strength. Flashing LED matches signal beep. Rechargeablae Ni-Cad batteries give 6-8 tracking hours. Includes charger, cord to operate from vehicle cigarette lighter and carrying case. Five yr. mfg. warranty. Weighs less the 2 lbs.