Chess Clock Digital Count Up Down Professional Checkers Timer Board Game Timer with Bonus and Delay

Nice product at a great price, but the English is unintelligible in the accompanying "instructions." After hours of laboring to make sense of the controls--to set a custom clock rule--I threw in the towel. And when one of the buttons got stuck, I decided to return the product. I think it might be easier to play against the Stockfish chess engine v12, set to infinity, than to figure out how to set a specific clock rule on this product.

Very good chess clock. The feature I like most is the alarm with intermittent sound in the last 10 seconds of time.