# Shelly i4 Gen3 Smart Four-Channel Inputs Controller

## Shelly i4 Gen3 Smart Four-Channel Inputs Controller

The Shelly i4 Gen3 is a small Wi-Fi and Bluetooth input controller with four independent switch/button terminals, used to trigger scenes, control other Shelly devices, or integrate dry-contact sensors into a smart home setup without switching any load itself. It fits behind existing wall switches or inside standard electrical boxes and is powered directly from mains L/N. Local control is available via its documented HTTP API, MQTT, webhooks, and Bluetooth, in addition to the Shelly cloud app.

### Specifications

**SKU**

SHELLY I4 GEN3

**Brand**

Shelly

**Category**

Smart Home

**Key Specs**

4 switch/button inputs (SW1-SW4) on screw terminals; Connectivity: Wi-Fi 802.11 b/g/n, Bluetooth 4.2; Power supply: 110-240V AC (L/N terminals); No relay/switching output (input-only controller); Dimensions: approx. 42x38x17mm; Mounting: retrofit into wall box or behind switch plate; Protocols: HTTP API, MQTT, webhooks, UDP, mJS scripting

## Details

- **Price:** 489.0 ZAR
- **Vendor:** Shelly
- **Type:** Smart Home
- **Tags:** Nology, Shelly, Smart Home

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 489.00 ZAR | In stock |

## Images

- Shelly i4 Gen3 Smart Four-Channel Inputs Controller

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> Source: [Guards On Duty Shop & Security Guards ](https://guardsondutyshop.co.za/products/shelly-shelly-i4-gen3)
> Updated: 2026-07-07