Features:

• 850/900/1800/1900MHz quad band, can be used in the global GSM network.
• No call charges. The GSM relay switch answers the call from the authorized number and then performs an on/off operation on the first "ringing".
• Security - Use the caller ID to identify and ignore unknown callers.
• Add or remove users with the SMS Text command.
• There is no need to provide remote controls or buttons for different users.
• Up to 200 authorized phone numbers can be configured at the specified time.
• The relay operation will return a text message confirmation to the owner or authorized call, which can be edited by the user.
• The relay closing or opening time is programmable.
• With metal casing, IP30 protection level. The metal casing and system are safely isolated, especially suitable for industrial control applications.
• Small size and support for wall mounting.
• Multiple applications.