Petsafe PDLDT-305 Deluxe Little-Dog Remote Trainer for Pets Under 40 Pounds

The first full-featured trainer designed for both the professional trainer & the average pet owner with no training experience. Use it to deter unwanted behavior such as digging, chewing on furniture, jumping on guests or barking or use it for basic obedience training. You control whether to send a tone only or a static stimulation. Eight levels of correction allow you to adjust the level of stimulation to your dogs temperament with a range up to 100 yards. Tone only feature reinforces commands without correction. Unique identification code in transmitter prevents outside interference. (Amazon)