Optimal Performance: your RC devices are at performance with our 3-channel digital servo tester. Perfect for adjusting speed, consistency, and steering gear settings. Versatile Compatibility: Compatible with various RC helicopters and cars, this tester is essential for hobbyists and professionals alike to maintain control and efficiency. User-Friendly Design: Designed with simplicity in mind, our servo tester allows for easy operation, making it suitable for both beginners and experienced users. Colour:Blue Material:plastic Package Contents: 5 * Digital RC Servoes 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.