What is the fine-grained topic of the following text: It features a helium release valve at the three o'clock position (allows gas build-up to escape to prevent damage to the watch), a screw-in crown, luminous (orange trimmed) hands and markers for great visibility in the dark, a scratch resistant sapphire crystal, uni-directional rotating bezel, a date window at 4:00, a Citizen-Miyota 8215 automatic (self-winding) movement, a screwed-in case back, 1000 meter water resistance, and a cool looking stainless steel mesh bracelet. Only return the topic.
Features of a Diving Watch