Grounded 120V 6oHz Analog (mechanical) timer with non-removable on-off pins for up to 48 on-off cycles per 24-hr period. Great replacement timer. This brand new timer has been tested, keeps time and works fine but has a slight humming sound that may not be important to you. Most mechanical timers emit some slight buzzing sound anyway which may be more noticeable in some than others. Free shipping for this item only applies to USA mainland.