8 buttons 4CH remote control with receiver board 27Mhz for DIY SNRM9

SINONING

$5.90  $7.90
SKU: SNRM9

8 buttons 4CH remote control with receiver board 27Mhz for DIY SN-RM9
this product can control two small motor go and back, it can use on tank , car etc.
Brand:SINONING
Model:SN-RM9
 
detail:
remote control:3v (2pc AA battery)
receiver board votlage:DC3-4.5V
control distance: about 10 meter
remote control size:8*45*118mm
receiver board size:42*27.2mm
weight:65g
 
how to us?
red wire-power positive, black wire-power negative
L R for motor 1
B F for motor 2
What mean for "8 buttons"?
each two button have same function.
 
shipping list:
1pc remote control
1pc receiver
1pc antanna