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
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