# Surveillance Camera Ring Alarm Contact Sensor (2nd Gen) 4SD2SZ-0EU0

**URL:** https://aio.lv/en/product--ring-4sd2sz-0eu0--6036135
**Data updated:** 2025-12-30 06:02 (EET)
**Category:** Surveillance Cameras
**Manufacturer:** RING
**Manufacturer code:** 4SD2SZ-0EU0
**Warranty:** 2 Years
**Availability:** Out of stock

## Summary description

The Ring Alarm Contact Sensor (2nd Gen) is a reliable security door controller housing with dimensions of 53 mm width, 14 mm depth, and 40 mm height. It enhances your home security by detecting when doors or windows are opened, providing real-time alerts to your smartphone. Easy to install and compatible with Ring Alarm systems, it ensures peace of mind and protection for your property.

## Long description

The Ring Alarm Contact Sensor (2nd Gen) 4SD2SZ-0EU0 detects when doors or windows are opened and communicates with your Ring Alarm Base Station to send real-time alerts. The compact sensor houses a removable slim magnet for straightforward installation on frames and works as part of a Ring Alarm system to monitor entry points and trigger notifications or the alarm when configured.
Advantages
The contact sensor is compact and easy to install, includes a removable slim magnet for flexible mounting, and connects directly to the Ring Alarm Base Station for reliable reporting. It provides configurable notifications to your mobile device and can trigger the alarm if tampering is detected while the system is armed in Away or Home mode.
Suitable for
Doors and windows in residential homes
Entry points in apartments
Monitoring secondary access such as garage doors or patio doors
Key specifications
Brand: RING
Model / MPN: 4SD2SZ-0EU0
Product type: Alarm contact sensor (2nd Gen)
Dimensions: 53 mm (width) × 14 mm (depth) × 40 mm (height)
Compatibility: Works with Ring Alarm Base Station
How to use
Attach the main sensor and the slim magnet to the door or window frame and the moving part of the door/window so that they align when closed. Connect the sensor to your Ring Alarm Base Station following the Ring app setup instructions, choose notification preferences (audio or mobile), and test the sensor by opening and closing the door or window. When the system is armed in Away or Home mode, the sensor can trigger the alarm if tampering or an opening event is detected.
Usage recommendations
Install the sensor on clean, dry surfaces and ensure the magnet and sensor are aligned within the recommended gap; keep the Ring Alarm Base Station within range for reliable connectivity and update firmware via the Ring app when available.

## Specifications

| Feature | Value |
|---|---|
| Case design | Housing |

### Weight & dimensions

| Feature | Value |
|---|---|
| Height | 40 mm |
| Width | 53 mm |
| Depth | 14 mm |

### Operational conditions

| Feature | Value |
|---|---|
| Operating temperature (T-T) | 0 - 49 |

## FAQ

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All RING products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized RING service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/6036135/66037695_large.webp