Watch features: 1. The watchband environmentally friendly silica gel is added with luminous powder, which has a luminous effect, and you can see a very obvious luminous effect at night or in a dark place. 2. The watch has a built-in luminous lamp movement. Press the button at 2 o'clock. The luminous lamp movement will start to glow and flash. The colorful lights will flash for about 10 seconds and then go out automatically. It will not flash and glow without pressing the button. Watch color: candy color translucent series, light pink, light purple, light blue, light green, transparent white 4 colors are available. Battery: The watch uses a battery that cannot be recharged. The watch has two built-in button batteries, the luminous lamp movement is equipped with CR2025 batteries, and the watch runs time with SR626SW batteries. The two batteries do not affect each other, and the battery can last for more than one year depending on the time. No longer have to worry about the battery is not durable. The light-emitting lamp movement battery is a large button battery with sufficient power. The specific service life depends on the number of times the light-emitting lamp is used per day. The battery can be replaced by yourself.