Description: 【Realistic Audio】: Experience the soothing sounds of nature with this bird chirping sound box, which contains 4 music tracks, ideal for recreating the peaceful ambiance of nature indoors 【Portable and Lightweight】: Its compact size makes it easy to carry wherever you go, allowing you to enjoy the relaxing bird calls anytime and anywhere, whether at home or on the move 【Quality Material】: Featuring sturdy PP, this sound box is not only aesthetically pleasing but also built to withstand wear and tear for long time use 【Battery Powered Convenience】: This product requires three AA batteries (not included) for work, giving you the flexibility to use it without being tethered to a power outlet 【4 Time Duration Options】: standard 3 minutes, 15 minutes, 30 minutes, or 60 minutes. Suitable for indoor space like living room, bedroom, or office, and outdoor garden patio or balcony, etc Specification: Material: PP Human Sensing Range: 3.0m Trigger Sound Duration: 3 Minutes 4 Duration Options: Standard 3 minutes, 15 minutes, 30 minutes, or 60 minutes Size Chart: 16.1cmx12.26cmx3.5cm/6.34inchx4.83inchx1.38inch Package Includes: 1 Bird Chirping Sound Box(Not Include Battery) Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.