The Q555 time switches are robust, 20amp switches that are ideal for the switching of heating and lighting applications- up to three times a day. The Q555 has a 4-pin base which means it has independent motor switching connections which enable a different switching circuit voltage from the voltage powering the time switch. The Q555 has a 100 hour battery reserve which is useful should there be a power failure. The day omit feature means you can skip any day of the week if necessary. There is also a manual override button for your convenience. The Refurbished Q555 time switch has been re-conditioned to a high standard and comes with a 1 year guarantee from date of purchase. FEATURES 100 hour battery reserveDay omit ON operation (stay off on selected days)24 hour cycle4-pin base (Volt free -independent clock & switch supply)2 on/off or 3on/off operations20A ratingTemporary override until next programmed event