Feature: 1. Heavy Duty Motor: This professional rock tumbler features a heavy duty motor that will last a long time and includes a leak proof barrel that runs quieter than other brands, very practical. 2. Multifunctional: This electric rock polishing machine is multifunctional and can turn rough rocks into polished gemstones, it can be used to discover and learn the fun process of tumbling rocks. 3. Advanced Features: This rock polisher has advanced features including speed control (for finer tumbling results), a 7 days timer (that automatically shuts off when needed), and can be used for a variety of purposes. 4. Excellent ABS Material: This electric gemstone polisher is made of excellent ABS material, which is sturdy and abrasion resistant, not easy to be damaged, and has a long service life, very useful. 5. Wide Application: This electric stone polisher has a wide range of applications, fun and educational for all ages, can be used for science projects, it fosters a love of science, geology and mineralogy in a fun and exciting way. Specification: Item Type: Electric Stone Polisher Material: ABS Operating Temperature: 0-37.8℃ Operating Humidity: 35-90% Maximum Load: 450g Package List: 1 x Electric Gemstone Polishing Machine 1 x Adapter 1 Bag x Rocks1 Bag x Accessories (including Keychain x 1, Hanging Earring Wire x 2, Adjustable Ring x 2, Connector x 2, 18 Inch Silver Necklace x 1, Rings x 2)1 Bag x Coarse Polishing Powder1 Bag x Fine Polishing Powder1 Bag x Polishing Powder1 Bag x Final Polishing Powder1 x White Glue (5ml) 1 x Manual