This is the Tactic TR624 2.4GHz Six Channel Receiver. FEATURES: Compatible with the Tactic TTX404, TTX600, and TTX650 stick transmitters Built-in bind button with red LED status indicator Programmable fail-safe No crystal required Very lightweight INCLUDES: Tactic TR624 2.4GHz 6-channel receiver REQUIRES: Installation and connecting battery and servos SPECS: Channels: 6 Receiving Frequencies: 2.403 - 2.480GHz Modulation: FHSS spread spectrum Input Power Requirement: Four AA alkaline, NiCd or NiMH cells (4.0- 6.0V) Fail Safe: Programmable; reduces throttle to a user-selected setting Dimensions: 1.77 x 0.98 x 0.50" (45 x 25 x 13mm) Weight: 0.28 oz (8g) Antenna: Internal jxs 05/07/10 ir/jxs Updated JMLM 3/23/11