Features:

1. Quad-band, can work in the worldwide GSM networks;

2. No call charges. the RTU5024 rejects the call from authorized number then carries out the turn ON/OFF action on the first 'ring';

3. Secure - Using caller-ID for identification, unknown callers are ignored;

4. Can be operated from anywhere, no distance limit;

5. Add or remove users by SMS Text command;

6. No need to provide a remote control or keys for different users;

7. Up to 200 authorized phone numbers can be configured at the specified time;

8. One output with relay rating 3A/240VAC for connecting the switch of the door or machines;