This is the 3 Pack of Optima 6 6-Channel 2.4GHz Receiver from Hitec. FEATURES: Dual LED status indicator with low battery warning SPC (Supplemental Power Connection) Fail safe and hold mode Compatible with transmitters using Hitec AFHSS 2.4 system Single BODA (Boosted Omni-Directional Antenna) Smart scan mode selectable Two year limited warranty through manufacturer beginning at date of purchase INCLUDES: Three Optima 6 2.4GHz receivers REQUIRES: Hitec AFHSS 2.4GHz transmitter SPECS: Dimensions: 46mm x 21.4mm x 12.1mm (1.8"x0.84"x0.48") Weight: 15g (0.52oz) Operating Voltage: 4.8-7.4V from receiver battery power or ESC 4.8-35V using SPC function Max Current Consumption: 190mA jml 2/11/11 ir/jxs