I've been happy with this timer from Amazon, which we've had about 3 years in our home gym: https://www.amazon.com/gp/product/B01D1M6C8M/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1.

It's not the model for you if you want to program complex metcons all the time, but it's cheap, visible, loud, and accurate. The 1.5" model is plenty big for us in the garage.