This is Futaba R404SBS-E 4-Channel F-4G-2.4GHz System Diversity Internal S. Special Functions: Diversity Antenna. Receiving frequency: 2.4GHz band. Channels: 4 + S. Telemetry Receiver RF power output: 2.2 mW EIRP. Power requirement: 3.7 V7.4 V battery Dry cell battery cannot be used. Size: 25.5×20.7×10.6mm (includes a 30.5mm high antenna housing). Futaba R404SBS-E 4-Channel F-4G-2.4GHz System […]