Before you buy the **Sonoff (Itead) PIR3RF**, check what's inside.

The Sonoff PIR3RF is a Wi-Fi enabled battery-powered motion sensor designed for smart home automation. It integrates with the eWeLink app, allowing for remote monitoring and triggering of other smart devices.

> ℹ️ **Note:** This is a battery-powered device. Remove batteries before opening.
> 
> ⚠️ **NOTE:** Ensure correct battery polarity when replacing CR2450 batteries.

## Quick Specs

- **Manufacturer:** Sonoff (Itead)
- **Model:** PIR3RF
- **Protocol:** WiFi
- **Chipset:** ESP/CK Chip
- **Ecosystem:** Sonoff
- **App:** eWeLink

## 🔧 Geek Corner (Flashing Info)

- **Chipset:** ESP8285
- **Flashable:** ❌ No
- **Info:** While it uses an ESP chip (ESP8285), the proprietary firmware and lack of exposed flash pins make it difficult to flash custom firmware like Tasmota without significant hardware modification.

## User Manual

Scanned pages from the official user manual:

## External Photos

Photos of the device exterior:

## Internal Photos

Teardown photos showing the PCB and components:

## Verdict

The **PIR3RF** is a **WiFi** device from the **Sonoff** ecosystem.