Product Description E6B includes calculation of time, speed, distance, altitude, true airspeed and density altitude questions. Perfect for flight training. On the front of the flight computer there is a logarithmic slide rule that performs multiplication and division. The wheels on the back of the calculator are used to calculate the effect of wind on cruising flight. Lighter, smaller, less fragile, one-handed, faster and requires no power. E6B flight computer is the manual computer preferred by both instructors and students! Due to different production batches, the color and packaging will be slightly different, but the products are of high quality. Material: plastic Color: As shown Package Contents: 1 x Flight Plotter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the actual item. The measurement allowed error is +/- 1-3 cm.