Website article - com/ video/ rtu5024- gate- opener- app- tutorial/ rtu5024 sms commands tutorial rtu5024 pdf - com/ video/ pdf rt. specification: model: rtu5024 gsm frequency: 850/ 900/ 1800 / 1900mhz digital output: nc / no dry contact, 3a / 240vac dc power supply: 9- 15vdc / 2a power consumption: 12v, maximum input: 50ma / average 25ma sim card: standard sim card antenna: 50ω sma antenna interface temperature range: - 20~ + 60° c humidity range:. › see more product details. rtu5024 is a professional gsm/ 3g/ 4g gate opener, this is the product' s operation manual. product function: the rtu5024 gsm door opener is a powerful gsm relay, it is a very simple device that can be used for authorized door access, control doors, change of remote equipment, car parking systems.