Model: ET-2834 Color:Blue Material: Plastic Features: With 1-LED red flashing light Can write the contact information on the back of flashing light, for the lost of the pet. Battery: 2 x AG13 batteries (included) Package included: 1 x Heart Flashing Product Dimensions: 4 x 3.9 x 1.6cm, net weight: 16g Package Dimensions: 13.8 x 7 x 1.5cm, Weight: 27g