Dogtra ''Yapper Stopper'' Rechargeable No-Bark Dog E-Collar -
Offered in 2 sizes with the same reliable electronics found in Dogtra's remote e-trainers. Fully waterproof with 7 variable intensity levels to control the amount of correction for any type of disposition. YS-500 is for medium to large dogs. YS-200 e-collar is designed for small to medium-sized dogs. Uses NiMH batteries (batteries and charger included).