1. Material: ABS 2. 2 speeds 3. Grinding head grinding, convenient and safe 4. Strong power and fast speed 5. Low vibration and low noise 6. Battery:a set of nickel-chromium rechargeable batteries, a single 1.2V, 400 mA 7. Diamond wheel, high strength and durable wear resistance 8. Unit weight: 0.25 kg 9. Dimensions: 13x2.8 cm