CBK Scram Patrol Ultrasonic Dog Repeller Chaser Stop Barking Attack Animal Protecton (Yellow) Combined laser and sonic pulsed sound; Humance instant deterrent. Repels garden pests at the press of a trigger; Effective up to 80 meters. Power supply:1*9v battery(not included) Output: 9V DC Working Current: 100ma Effective Range: up to 20 feet(6M) Ultrasonic Frequency: 25KHZ WARNING: DO NOT point laser light directly into the eyes,it will cause serious damage to the eyes!