Features: 1. Flash content and flashing light color can be made according to customer's requirements. Conventional colors are red/yellow/orange/blue/green/powder/white 2. The shell can print the company LOGO / phone / website / address / QR code / slogan, etc., printing area is 3.5X2.3CM 3. Regularly put PP bags into white box or neutral color box packaging, more than 3,000 quantities can be customized packaging 4. The product uses 3 No. 7 batteries, the battery can be replaced, and the regular shipment does not contain batteries.