Quantity: One Piece Tips: 1. The product contains adapter specifications. 3. Before purchasing, please confirm whether the aerator to be installed with the faucet can be unscrewed normally, and whether the thread specifications are: M20 external thread, M22 external thread, or M24 internal thread. Other specifications cannot be temporarily adapted. The product comes with an adapter: M20 internal thread / M24 external thread adapter + M22 fixed connector 2. The product uses the principle of infrared induction to produce water, and the characteristic of infrared is that the distance will be different when different substances are detected. For example, when washing hands, it will be closer than when washing dishes. If you use water cups or pots and pans to store water, it is recommended to use the side sensing mode. [Automatic and Touchless Water Saving Device] Simply place your hand under the water outlet and the water will flow out automatically until it is away from the sensor. This is the easiest and most hygienic way to use a sink. [Upgraded Dual Induction Faucet] Two groups of induction zones, two water outlet modes, 0.25 seconds fast induction. Discharge water by infrared induction to reduce contact pollution. [Economy] Compared with other touchless faucets, the touchless faucet adapter is affordable, eliminating the unnecessary waste of throwing away the existing faucet. By using your water control system, you can reduce water costs by 65% from one faucet to another. [Electric power for three minutes] The object to be detected appears and the water continues to flow. If the sensor enters the side detection area while the water is flowing, the water can be turned off at any time. [Easy to use] 3 types of connectors (internal M20/M22 and external M24 adapters) are suitable for most kitchen faucets. Simple installation does not require additional installation costs. The USB charging cable makes charging easy. It can be used for up to 6 months after being fully charged.Good quality product