pecifications:

Transmitter: AM Transmission
Rolling code
Transmitter Frequency: 433.MHz
Three channel
Controls up to three different doors or gates
New code every use
Over 100 billion code to choose from
Power supply: 2 x 3v batteries
Size: 75mm Length x 43mm Width x 16mm Height

Compatibility:

MR60, MR600, MR600A, MR650, MR800, MR800A, MR850 & MR1000
MT5580, MT5580P, MT60, MT60P, MT600, MT800, MT1000, MT230 & MT3850
MJ3800 & MJ3800R
MGA600
MGL300 & MGL400
MGS500, MGS500T, MGS1000 & MGS1000T
ML500, ML700, ML500, MLR750 & MLR850
HE60 & HE60R