The KST1000 Shot Timer by Kestrel Ballistics is the most versatile, rugged, and dependable shot timer available. Backed by a 5-year warranty and made in the USA, this timer won't quit. Designed and built in the USA 5 Nameable setting presets 2 Easy-to-use screens from your hip or in your hand Compatible with dry fire and suppressed shooting Extra Loud Buzzer Waterproof and dust-proof Bluetooth Link Enabled Durable Drop-tested to MIL-STD-810G standards Mfg: Kestrel