This is a pair of Tactic SLT 2.4GHz TR624 2.4GHz Six Channel Receivers (2-Pack).
Includes: Two Tactic SLT 2.4GHz TR624 2.4GHz Six Channel Receivers
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)