1. How to use: The navigation light has three-stage switch, followed by double flash, quick flash, and breathing. Please paste the transparent protective primer on the pre-installed position, and then paste the light with adhesive on it. Optionally on or use a base. 2. Charging: When charging with the attached charging module, the indicator light is red for charging, and blue for charging completed. If charging with CB86, PL8, A6, simple charger, etc., please control the current within 0.1A. 3. Product specifications: size 43mmx13mmx11mm, weight 4g, battery capacity 75mah, voltage 3.7V, with overcharge protection. Compatibile with:RC Cars Airplanes Helicopters Boats Robot,etc. Colour:As Shown Material:Plastic+Metal Package Contents: 3 x navigation light 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 real thing. The measurement allowed error is +/- 1-3cm.