HUIOP GSM Door Gate Opener Remote On/Off Relay Switch Door Access Door Opener by Free Call SMS Command,GSM 3G 4G Remote gate Controller
$17.80
Description
2. Support authorized 1001 user numbers. Support to query the number authorized by yourself.3. Support 9-36V wide voltage input.1. Support global 2G 3G 4G communication frequency.4. Support relay delay closing time 0-999 seconds.5. Support the relay to be permanently closed until the command interrupts the closure
