Feature: 1. Signal Lamp: There are two working modes of steady on and blinking, which can meet the needs of different situations. You can choose according to the actual situation. 2. Excellent Grade Material: The signal light is made of silicone and gel material, waterproof and durable, with nice sealing and flexibility. 3. Reasonable Design: Back hook and loop full coverage, more firm adhesive; With a strong lanyard, you can choose more ways to wear it. 4. Usage Scenario: Widely used in a variety of outdoor activities, cycling, diving, hiking, etc., easy to carry, you can take it to participate in a variety of outdoor activities. 5. How to Place it: It can be attached to a helmet, hung on a backpack, attached to a bike seat or hung around your neck, and can be placed according to your needs. Specification: Item Type: Personal Identification Marker Light Material: silicone and gel Battery: Built in CR2023 button battery capacity 150mAh shipped with built in battery. Package List: 1 x Signal Lamp