4G Emergency Call System | SOS Alarm Button

Stay protected 24/7 with the most reliable 4G emergency solution for seniors, patients, and solo workers.

The LDASEC LD-SOS01 is not just a panic button; it is a complete, standalone safety net. Powered by stable 4G cellular technology, this system works anywhere with mobile coverage—no landline or home WiFi required. Whether at home, in the garden, or in a care facility, help is always just one press away.

Why Choose This 4G SOS System?

Unlike basic intercoms or Bluetooth pendants, this 4G Emergency Call System creates a wireless ecosystem of safety. It connects up to 20 wireless sensors and 10 SOS buttons via a stable 433MHz connection, allowing you to build a fully monitored environment for a single room or an entire floor.

Key Features at a Glance

Instant 4G Alarm Calling

• Preset 3 emergency phone numbers (family, neighbor, call center).

• One-key dial – Calls all preset contacts sequentially until answered.

• Alert SMS – Sends a pre-written help message to contacts.

Two-Way Hands-Free Talk

• Auto-answer incoming calls from preset numbers – listen in to check on the user.

• Voice-activated – Speak through the powerful built-in mic and speaker without pressing a button.

• Clear, loud audio ensures the user can communicate even if they cannot reach the device.

Reliable Power & Backup

• Runs on DC5V 1A power.

• Built-in 500mAh backup battery – System remains active during a power outage.

• SOS portable buttons - run on CR2032 batteries and have a average 6 month battery life

• Low battery warning alerts you before the device powers down.

Expandable Wireless Ecosystem (433MHz)

• No motion alarm (Elderly care) – Pair with a presence sensor to alert if no movement is detected for a set time.

• Doorbell function – Works with a wireless doorbell button to announce visitors.

• Supports door/window sensors, smoke detectors, water leak sensors, and more.

Designed for Elderly & Patient Safety

• Help rope – A physical pull cord for users who cannot press a button.

• Optional Wristband SOS Button – Water-resistant panic button worn on the wrist.

• Large, tactile single call button for easy use.

What’s in the Box? (Standard Package)

• 1 x 4G Host Unit (with 500mAh backup battery)
• 1 x DC5V 1A Power Adapter
• 1 x Help Rope
• 1 x User Manual