Warm Tips: - Please allow a 1-3mm error due to manual measurement. - The business card or suggestion paper shown in the picture is not included. - Keep your keys safe if the mailbox is not in use to avoid losing them. Features: - Durable & Convenient Suggestion Box: - Dimensions: 9.3 x 7.3 x 5.2 inches (L x W x H) - Sign slot: 5 x 7 inches - Side pocket slot: 4.7 x 1 inch - Made from high-quality thick acrylic material for a solid and stable structure with a long service life. - No assembly required; easy to use. Can be mounted on a wall or door, or placed on any desktop. - Upgraded Sign Slot Design: - Features a non-detachable sign slot for enhanced durability and flexibility to change the occasion of use. - Safe Lock Box: - Equipped with a sturdy and reliable lock to secure internal documents and information, ensuring the confidentiality of suggestion letters, business cards, ballot tickets, or tips. - Comes with two keys to prevent loss and ensure easy access. - Black Acrylic Collection Box: - Ideal for securely collecting tips, suggestions, and confidential ballot tickets. - The side pocket is perfect for holding blank cards, letter papers, or pens, providing convenience for participants.