Description: Motion Sensor Technology: This music controller utilizes advanced infrared motion sensing technology to automatically play music when someone by, eliminating the need for manual operation. Made of ABS PC material, lightweight and long term useJoyful Spring Festival Music Library: Equipped with a curated selection of Spring Festival themed and upbeat music tracks, this festive music battery box offers cheerful melodies with distinct rhythms. In size 20 cmx5 cm/7.87 inchx1.97 inchPortable Battery Box Design: Featuring a detachable and easy to replace battery box, this controller does not require a fixed power source. Enjoy the flexibility of placing it anywhere indoors or outdoors as you needHigh Sensitivity Sensor & Quality Speaker: With its high sensitivity sensor ensuring quick and accurate motion detection paired with high fidelity speakers delivering clear and delicate sound quality, this movement sensor speaker perfectly presents musical pieceVersatile Application Scenarios: The spring festival music battery box is ideal not only for family gatherings during the Spring Festival but also suitable for commercial settings such as malls, hotels, restaurants during festive decorations or various outdoor events to enhance ambiance Specification: Material: ABS PC Size Chart: 20 cmx5 cm/7.87 inchx1.97 inch Package Includes: 1 Spring Festival Sound Player(AA batteries not included) Note: Please allow slightly errors due to manual measurement and different monitors.