Dog light glowing pendant $ 8.79 Product model: K55034 Working mode: flashing / constant light dual function Power supply battery: CR2032*2 Life time: 300h/500h always on/flashing Visible distance: 5 kilometers Waterproof rating: IPX81 100 meters underwater Product material: high-strength ABS plastic Working environment: -40C- 50 C Size: about 4cm in length x 3.1cm in diameter and 2.7cm in thickness