FrSky Tandem X20RS Radio System

(A true simultaneous Dual-Band 2.4/900Mhz system) Fully compatible with the (AR) Advanced Radio Smooth Flight ARXL 16 and 26 channel systems! FrSky X20RS     Internal 900MHz/2.4GHz Dual-Band & External Module BayThe TD dual-band RF system combines both the features and advantages of FrSky 900MHz and 2.4GHz RF together in one system. The TD features real simultaneous dual-band long-range control with telemetry that achieves reliable end-to-end 4ms latency while maintaining a robust and high-quality signal link. The entire range of TD, ACCESS & ACCST D16 receivers are supported. The built-in TANDEM RF System supports ACCESS and ACCST D16 protocols. Overview TD-ISRM RS RF PERFORMANCEWith solid performance based on the dual-band 900M/2.4G RF signal link with multiple operating combinations of RF modes, the TANDEM X20R & X20RS versions are equipped with the TD-ISRM RS built-in RF module which is capable of supporting multiple protocols (like TW, TD, etc).The TD-ISRM RS RF