Review on Sper Scientific 810005 Large Display by Aisha Quinn

Why can't they make a simple timer that's easy to work with? This thing requires you to rotate it, slide the "Set/Lock" knob from the "Lock" position to the "Set" position. Set a timer. THEN push the clogged knob back to the locked position. You're looking at the front of the timer all the time, but the add minutes and lock/set features are on the back of the timer. Why? It's too hard to work with and super frustrating. So you have two things and you want to add time, you're back to the open, install, lock exercise, which just sucks.