Spektrum SPM9560 RC Helicopter Heli Aircraft RPM Sensor And Bracket AR7200BXThe Spektrum SPM9560 RC Helicopter Heli Aircraft RPM Sensor and Bracket AR7200BX is a black sensor designed for helicopters. It is compatible with various brands such as Spektrum and is suitable for ages 8 and up. This nitro fuel source sensor is part of the 2019 model and comes with a bracket for easy installation. The sensor is versatile and can be used with different scales and vehicle types, making it a valuable addition to any RC enthusiast's