Features Durable Zinc Alloy Construction - Crafted from high-quality zinc alloy, this holder is resistant to corrosion and wear, ensuring long-lasting performance in any lab environment Innovative Three-Jaw Design - The three-jaw mechanism distributes weight evenly, providing a secure and stable grip on your flasks and tubes for reliable experimentation Non-Slip Claw with Sleeve - Features a specially designed claw portion with a non-slip sleeve that enhances grip, preventing accidental slips and ensuring your samples stay securely in place Versatile Compatibility - Ideal for holding small flasks or cylindrical glass tubes, this clamp accommodates a variety of lab equipment to meet your specific research needs Adjustable Clamp Diameter - The prong clamp adjusts to fit circular objects with diameters ranging from 0-80mm (0.0-3.1in), providing flexibility for different lab setups and experiments Features: 1、MULTIPLE USAGE: This digital hygrometer is very suitable for wood, firewood, logs, cardboard, paper, etc. 2、HIGH MEASUREMENT ACCURACY: Use the sensitive electrode needle to measure wood, the humidity measurement range is 0？99.9%, and the accuracy is l than ±0.5%. 3、FOUR MEASUREMENT MODES: Built in four measurement modes, including more than 50 common woods, users can choose the corresponding group to improve the measurement accuracy. 4、 MATERIALS: Made of ABS plastic, it has excellent durability. It comes with environmentally friendly packaging. The body is strong and resistant to fall, suitable for a variety of special environment. 5、CONVENIENT DESIGN: Automatic shutdown to save battery power (battery not included), low battery icon is displayed. Ergonomic design, excellent hand feeling. Specification: Item Type: Meter Material: ABS Battery: 9V 6F22x1 (Not Included) Purpose: It can be used to measure the content of various wood/paper/cardboard and other materials Support Language: English Basic Parameters: Humidity Measurement Range: 0~99.9% Accuracy: 0.1% Accuracy: ±0.5% Package List: 1 x Moisture Meter 1 x Manual Package List 1 x Moisture Meter 1 x Manual