Compact round hygrometer and thermometer for string instruments Keep your guitar or violin in the right environment with this compact round hygrometer and thermometer. Its mini size and clear indicating needle provide quick, easy readings so you can take action before humidity or temperature cause problems. Key benefits Helps reduce the risk of cracking, warping, and shrinking by monitoring relative humidity and temperature. Precise indicating needle gives clear, immediate readings without batteries. Small, round profile fits inside instrument bodies or cases without interfering with storage or play. Simple installation and durable construction make it suitable for frequent use and travel. Delicate, well made appearance that blends with instrument interiors and cases. Main features Function: combined hygrometer and thermometer for monitoring relative humidity and ambient temperature. Design: mini, round form factor for unobtrusive placement in instrument soundholes or cases. Display: analog needle indicator for fast, easy reading. Durability: fine workmanship and simple style intended for regular use. Compatibility: designed for guitars, violins, and other acoustic string instruments and their cases. Use scenarios In a guitar or violin case: place the gauge inside the case to monitor humidity and temperature during storage or transport, helping to prevent warping and cracking. In a practice room or studio: keep the mini hygrometer on a shelf or bench to track room conditions and decide when to use a humidifier or dehumidifier. During travel or gigs: install the gauge in the case to check conditions while instruments are moved between locations. What you get A compact, round mini hygrometer and thermometer with an analog indicating needle. A practical tool to monitor and manage instrument environment, easy to install and built for regular use. This mini hygrometer is a straightforward, reliable way to keep humidity and temperature under control for guitars, violins, and their cases.