The AMG Lab timer is my current preferred timer. Simple to operate. Has a choice of loudness settings for start horn. Loud is loud; easy to hear. It will Bluetooth to a tablet running the Practiscore program. Picks up 100% of the time there. Been on the market 2-3 years now. The first year or so availability was scarce, so wait times of up to 12 months happened. Manufacturer didn't skimp on quality while he upped production. Several vendors carry it now and availability is more likely to be a few weeks, at most. May require a potential effort to check stock frequently on those vendors, to catch what they want, such as skin color, on the shelf.