Feature: 1. Good Detecting: This portable can effectively detect coin, jewelry, gold, silver ornament and so on, ideal for inspection, searching, etc. 2. Reliable Works: Equipped with waterproof search coil, the pinpointer also enables easy operation for convenient using and more fun as well. 3. Easy Adjusting: Allows for flexible length adjustment, the metal finder suits perfectly for both kids and adults of all ages, very useful. 4. Happy Learning: Through the exploration and search, children and students can better understand the nature through their own practice. 5. Ideal Present: Moreover, you can give the coin finder as a great present to your family and friends for birthday, anniversary and more. Specification: Item Type: Metal Detector Battery: 1 x 9V 6F22 battery, shipped without battery. Current: 30MA Sensitivity: Approx. 5cm ± 1cm / 1.97in ± 0.39in Frequency: 3KHz Power: 270mW Temperature Range: - 20℃ ~ 60℃. Package List: 1 x Base with Connector1 x Middle Connector1 x Handle1 x User Manual