72mm Round Gold Hygrometer Humidity Meter Gauge Ring Surface - No battery needed

Product Features: - No battery needed, no power supply - Round shaped style, easy to read with simple dial - Widely suitable for humidors, greenhouses, cigar humidor, musical instrument cases, incubation, wood furniture and more - Made of premium quality material, durable for long-term use - Easy to install and maintain, convenient to use - Gold finish, stylish and exquisite Key Usage Points: - Battery free and power supply free - Easy to install and use - Durable and long-lasting - Stylish and exquisite Detailed Specifications: - Measurement range: 0-100% RH - Accuracy: ±5% RH - Size: 72mm x 18mm - Color: Gold - Material: Metal Additional Features: - Compared with traditional hygrometer, this one needs no battery or power supply, which is more energy-saving and environmentally friendly. - The exquisite design makes it a perfect decoration for your humidor or other places. - The clear and easy-to-read dial allows you to quickly and accurately measure the humidity level. External Links: -

Instructables: DIY Hygrometer -

WikiHow: How to Use a Hygrometer