StopWoofer Humane Bark Collar-Dog bark Collar-Anti Barking Collar Small Dogs Medium Large Dogs-Rechargeable Waterproof Anti bark Collar-No bark Collars Sound Warning Vibration Electric Stimulation Voltage: 110v/60Hz; Max speed: 22,000 RPMS Arbor size: 3/8''; Foot control switch; Weight: 8lbs (components with case) 5/32'' capacity chuck -No.30 type hand piece -diameter: 1'' Assembly & operating instructions INCLUDED; Quantity: 1 ; Case size: 15''L x 3-1/2''W x 11-1/2''H