SMS Activated Relay
4G GSM Remote Switch for Gate, Garage & Industrial Control
Control Devices Remotely Without WiFi or Internet
This advanced SMS-activated relay switch allows you to control gates, shutters, garage doors, and industrial systems remotely via a free mobile call—no WiFi or internet required. Ideal for elevators, parking lots, resorts, warehouses, control rooms, and unmanned facilities, it offers secure, cost-free access through global GSM networks.
Key Features of the 4G GSM Remote Relay
GSM-Based Remote Control
Supports 3G and 4G networks with free call activation, SMS commands, and app-based access via the Callny Control app.
Multi-User Authorization
Add up to 1001 authorized users for secure access. Unknown callers are automatically rejected for enhanced protection.
Adjustable Relay Timing
Customize relay closure from 0 to 9999 seconds or enable continuous operation with no time limit.
App & SMS Integration
Control the device via mobile app, SMS, or direct call—no data charges, no internet dependency.
Durable ABS Housing
Encased in high-quality plastic for impact resistance, insulation, and long-term reliability. Wall-mountable for easy installation.
Wide Voltage Support
Operates on DC 9V–36V, compatible with a variety of electrical systems and industrial setups.
Applications
- Garage door opener
- Gate and shutter controller
- Elevator access
- Parking lot automation
- Warehouse and control room systems
- Traffic signal control
- Remote machine activation
- Smart access for resorts and base stations
Technical Specifications
| Parameter | Value |
|---|---|
| Rated Voltage | DC 9V–36V / 1A (Power supply not included) |
| Operating Temperature | -10℃ to +60℃ |
| Storage Temperature | -20℃ to +60℃ |
| Humidity | 10–90% (non-condensing) |
| GSM Frequencies | 850/900/1800/1900 MHz |
| 3G/4G Compatibility | WCDMA, CDMA2000, LTE-FDD/TDD |
| Communication Protocol | GSM PHASE 2/2+ with data service |
| Output Relay Voltage | 3A / 240V AC |
| SIM Card Type | Nano SIM (3V) |
| Antenna Type | 50 Ω SMA |
| Wired Switch Support | Yes |
| Dimensions | 96.5 × 50 × 31.5 mm |
| Net Weight | 88g |
| Relay Port | 1-way output |
| Contact Capacity | 5A @ 250VAC, 20A @ 14VDC, 20A @ 5VDC |
Why Choose This SMS Relay Switch?
Whether you’re managing access to a garage, gate, or industrial system, this GSM relay switch offers secure, remote control without relying on WiFi or internet. With multi-user support, customizable relay timing, and durable construction, it’s a reliable solution for smart access control in offline environments.
OTHERS:
Visit our section dedicated to GSM / SMS Controlled devices HERE
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