New JR / Spektum R21 Receiver. Works with either. I have changed transmitter to DSSM so no longer have a use for these. Full spec

Features

• 9 channels
• Patented DuaLink®
• SmartSafe™ fail-safe system
• Two types of fail-safe
• Flight Log compatible

Overview

The JR R921 receiver combines Spektrum’s exclusive, patent-pending DSMX protocol—plus the brand’s patented DuaLink® technology—and the result has been revolutionary. The radio system simultaneously transmits on two frequencies, creating dual RF paths. This dual path redundancy, plus the fact that each of the two receivers is located in a slightly different location, exposes each to a different RF environment and creates a superior path diversity RF link in all conditions. This product is not intended for use by children under 14 years of age without direct adult supervision.

Tech Notes

Binding note: The bind port on the R921X recevier is different than the port on the R921 receiver. Please be sure you are inserting the bind plug into the correct port. See the manual for further details.

Specifications

Type: 9-Channel Full-Range DSM2 Receiver # of Channels: 9 Modulation: DSM2/DSMX Band: 2.4GHz; Resolution: 2048 Length: 1.91 in (49mm) Width: 1.22 in (31mm) Height: 0.55 in (14mm) Weight: 0.53 oz (15 g) Voltage Range: 3.5 to 10V