This is the Optima 7 7ch 2.4GhZ Receiver from Hitec.

FEATURES: Dual LED status indicator with low battery warning
          SPC (Supplemental Power Connection)
          Telemetry sensor and system port
          Fail safe and hold mode
          Compatible with Transmitters using Hitec AFHSS 2.4 system
          Single BODA (Boosted Omni-Directional Antenna)
          Scan mode selectable
          Two year limited warranty beginning at date of purchase

INCLUDES: One Optima 7 2.4GhZ receiver

REQUIRES: Hitec AFHSS 2.4GhZ transmitter

SPECS:    Dimensions: 57 x 21 x 11.4mm (2.24 x 0.82 x 0.44in)
          Operating Voltage: 4.8-7.4V from receiver battery power or ESC
                             4.8-35V using SPC function

                                                                    lmm 12.3.09
                                                                         ir/jxs