GSM GPRS 3G Gate Opener/Access Control System RTU5025: Advantages: --GSM or 3G band, distribute worldwide applications; --Up to 999 authorized phone numbers can be configured at the specified time for access control; --No call charges. Reject calls from authorized number then carries out the turn ON/OFF action on the first 'ring'; --Secure – Using Caller-ID for verification, unknown phone calls are ignored; --SMS confirmation of relay actions(door open) to the owner or authorized caller number. --No need remote control or keys for different users; -- Up to 10,000 events log, download the operation historical data by USB or over GPRS; --Multiple applications. (gates, bollards, barriers, garage doors, shutters and access doors or machines); Order Table RTU5025: GSM 850/900/1800/1900MHz RTU5025W: 2G: GSM900/1800MHz, 3G WCDMA : 900/2100MHz UMTS ; RTU5025C: 2G: GSM850/900/1800/1900MHz, 3G: 850/1900MHz UMTS. RTU5025T: 2G: GSM850/900/1800/1900MHz, 3G: 850/2100MHz UMTS. Smart Phone APP configuration.