1. Material: 304 stainless steel + metal 2. Strap: silicone 3. Waterproof level: more than 50m waterproof 4. Light energy drives the movement, no need to replace the battery 5. Solar charging technology, long-lasting battery life 6. Swimming is supported, but showering, hot springs, and diving are not supported.7. Luminous function for clearer reading at night 8. Light and comfortable, the silicone strap has good plasticity 9. Super long battery life, 180 days of battery life on a full charge
