Luminous Titanium Silicone Strap for Apple Watch Ultra 3 2 1 49mm 11 10 46mm Magnetic Band for Iwatch 9 8 7 45mm 6 5 SE 4 44mm

High-concerned chemical : None Compatible Brand : APPLE Gender : Unisex Model Number : APB2152/2153 Clasp Type : Magnetic Band Material Type : Titanium Brand Name : CAOWTAN Origin : Mainland China Condition : New without tags Item Type : Watchbands

Note: The strap of this product comes in two materials for you to choose from, namely titanium and stainless steel. Please pay attention to distinguishing when placing an order!!! The case is made of metal alloy material.The luminescence principle of night light watch straps is a phenomenon of photoluminescence, with the core being the energy conversion process of "absorption energy storage luminescence".The luminescence process is mainly divided into three stages:1. Energy absorption: Luminous powder absorbs external light (such as sunlight, lights, etc.), and its internal electrons are excited to high-energy states.2. Energy storage: Excited electrons do not immediately release energy, but are temporarily captured by the "trap energy levels" inside the material, thereby storing energy.3. Release energy: When in a dark environment, electrons will slowly release from the "trap" and return to a low-energy state. During this process, energy is released in the form of visible light, resulting in a sustained "night light" effect.