1. Material: plastic 

2. Size:standard 

3. couple led keychain can be used for lighting, advertisement 。

4. Promotional keychain can print or engraving logo and trade mark as your request. 

5. couple led keychain can light on when take out of plastic insulating strip and then swival the power button ending of this keychain

6. Keychain in square shape with an led light

7. Many different size torches light available 

8. Powered by 3pcsx LR41(included) 

9. Environment friendly and Easy to take and use 

10. You can use it to open the door in the night