SPEKTRUM AS6410NBL DSM2 DSMX 6-Channel AS3X Receiver with Brushless ESC，Voltage Range：2SLipo（7.4-8.4V）,There are 3 kinds：HR411F, HR406F, HR207F, 406F and 207F are alomost the same，HR411 have no heat sink，the power leader is slightly shorter than another two.
Front, this is HR207F
Back，this one have no label
Give some connectors for receiver. A power conversion plug for battery, a 3P plug for brushless motor, four 1.0mm 3P JST plugs for servo