E6B calculates time, speed, distance, altitude, true airspeed, and density altitude. Ideal for flight training. The front of the flight computer features a logarithmic slide rule for multiplication and division. The wheels on the back are used to calculate wind effects during cruise flight. Lightweight, compact, durable, one-handed operation, fast, and requires no power. The E6B flight computer is the preferred manual tool for both instructors and students. Color and packaging may vary slightly due to production differences, but all products are high quality. Material: Plastic Color: As shown Package Contents: 1 x Aviation plotter Note: Other items not included. Note: Lighting and display differences may cause slight color variation between image and actual item. Measurement may vary by +/- 1-3 cm.