ELITE-TEK 4-IN-1 REMOTE CONTROL 2 DOG TRAINING COLLAR WITH SHOCK,VIBRATION,ULTRASOUNIC SOUND, AND ANTI-BARK Collar features shock, vibration, ultrasonic sound. Control 1 dog at at time or control 2 dogs at the same time. Stimulation has 10 different intensity levels of shock, vibration and ultrasonic sound Collar can be set to automatic anti bark mode and the remote can still be use for correction Rechargeable heavy duty water-proof receiver and up to 550 meters range