Package content: This product includes three backlit keyboards and one non-backlit keyboard. The 1, 4, and 9-key keyboards are backlit; the 6-key keyboard is not backlit. You will receive 4 keyboard toys, including a 6-key keyboard, enough to meet your various gaming needs. You can also share them with family or friends. Stress relief: The keyboard clicker is ideal to play with. You can play with one hand or press with both hands at the same time. When you press it, it makes a sound and relieves your anxiety and restlessness (Note: The keycap and the product's base are reinforced. However, due to the long transportation time, the keycap may come loose due to impact. After receiving, align the keycap with the base and click it into place to complete the installation. After normal use, the product will be usable again.) Long-lasting use: The adult mechanical key toy is mainly made of high-quality material, is sturdy and reliable, odorless and safe, does not break or discolor easily, making it durable for a long time. Lightweight and portable: The click toy is lightweight and portable, easy to carry, saving you time and energy. Detailed measurements are in the picture. A thoughtful gift: This mechanical key toy is delicate and colorful, ideal to give to your father, mother, colleagues, family members, and others in need, to show your kindness and care. Tips: To prevent energy waste, check if the product has a transparent plastic disc covering the gap between the keycap and the shaft. After removing this disc, the product can be used normally.