I've used this for about two years, but I'm selling it because I'm retiring from drifting. I think it works without any problems. Everything in the photos is included. No claims and no returns, please. The "GYD550" allows for ultimate machine control even with large action posture changes by incorporating a "damper" that suppresses hunting that occurs when increasing gyro sensitivity, and a "tail slide speed" that controls the desired drift angle. It is also a state-of-the-art drift-specific gyro equipped with a wireless tuning function that allows for instant data changes in response to ever-changing conditions. ・Operating Voltage: DC3.5V～8.4V ・Dimensions: 22.6x19.6x11.0mm ・Weight: 5.6g (body weight only) 【Functions】 ● Normal/AVCS Mode ● High-Speed Response Mode ● High Gain Mode ● Tail Slide Speed Adjustment ● Gyro Curve Adjustment ● Left/Right Endpoint Adjustment ● Damper Adjustment ● Stick Priority Mode Adjustment ● Wireless setting for S.BUS servo ● SR Mode Compatible ● Wireless Adjustment Function Compatible