Seiko Other Swimming Master Black

---------------------------------------------------------------------- Maximum time measurement: 10 hours. Minimum time measurement (seconds): 1/100. Power supply: Coin-type lithium battery (CR2430) x 1 (included). Waterproof: 10 ATM water resistant. Width (mm): 61｡ ●The main body is antibacterial. [Caution] ●Please use according to the intended use. ●We cannot accept time specifications.