The Futaba R304SB 2.4GHz T-FHSS 4-Channel Telemetry Enabled Receiver is only compatible with Futaba T-FHSS telemetry compatible transmitters.

NOTE: This receiver is NOT compatible with 2.4GHz FASST, FASSTest, FHSS or S-FHSS non telemetry systems. 

Specifications:

• Power Requirement: 4.8 - 7.4V battery (dry cells cannot be used)
• Receiving Frequency: 2.4GHz
• System: T-FHSS (auto detection) with SBUS2 port
• Dimensions: 1.38 x 0.91 x 0.33" (35.1 x 23.2 x 8.5mm)
• Weight: 0.23oz (6.5g)
• Antenna Length: 7-1/2"
• Modes: Normal Mode/Analog Servos and High Speed Mode/Digital Servos
• Number of Ports: 5
• PWM Output: 4
• SBUS Ports: 0
• SBUS2 Ports: 1
• FASST: No
• Telemetry: Yes (T-FHSS)
• S-FHSS: No
• High Speed: Yes
• High Voltage: Yes
• Connector: J (STND)
• Range: Full Range