Power supply requires 2 AA 1.5V alkaline batteries (not included), ensuring easy replacement and accessibility. Product appearance, color, and printed text due to different batches, providing a touch to each item. This product is designed for versatility and convenience, making it suitable for various applications. The use of standard AA batteries allows for management, while the potential variations in design add a personalized element to each unit. Enjoy the functionality and uniqueness that this product offers. Color: As Shown Material: ABS Package Contents: 1*Thermostatic Valve Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.