---
title: What’s the difference between the SMF/BT and  S2W/BT?
description: "**The SMF/BT (GEN1)** and SMF/BTAS (GEN3) are the multi function controllers which requires only an active and a neutral connection. **It is a PIXIE Secondary device which needs PIXIE Master devices to operate**   - - Think of this device…"
url: "https://pixiepartners.com.au/support-docs/whats-the-difference-between-the-smf-bt-and-s2w-bt/"
updated: "2021-08-06"
category: Installation
tags:
  - 2way
  - 3way
---

# What’s the difference between the SMF/BT and  S2W/BT?

**The SMF/BT (GEN1)** and SMF/BTAS (GEN3) are the multi function controllers which requires only an active and a neutral connection.

**It is a PIXIE Secondary device which needs PIXIE Master devices to operate**

 

- - Think of this device as a permanently powered Bluetooth remote control with 2 specific operating modes
- - This device does not control the load directly and hence does not have a load rating
- - The 2 modes are **MIMIC Mode**, where the device is paired to directly mimic the Master PIXIE device to which it is paired;**Scene Mode**, where PIXIE scenes can be paired to a single press and/or double press action

 

Its is recommended that where-ever a neutral is available, use the SMF products for all multiway control (2-way, 3-way...8-way), group control and scene control.

  [Visit the SMF/BT product page](https://pixiepartners.com.au/product/sal-pixie-multifunction-switch-smfbt/) | [Download the installation manual](https://pixiepartners.com.au/wp-content/uploads/2019/12/SAL-Pixie-Multifunction-switch-smf-bt-installation-instruction.pdf)

 

**The S2W/BT** is a classic 2 way switch that is best used where existing 2 way or 3 way **straps already exist** and 2 way or 3 way control is required **OR no Neutral is present** and you cannot use the SMF/BT or SMF/BTAS Multifunction controller for multiway control.

**It is also a PIXIE Secondary device which needs PIXIE Master devices to operate.**

- - Wire in parallel - active and switched active by 'converting' your in situ straps
- - 3 way maximum setup via this wiring configuration is achievable
- - MIMIC mode only available, no scene mode as per SMF/BT capability, If this is required consider using the SMF/BT instead
- - Note: This device only has an illuminated indicator LED when the attached load is operated

 

  [Visit the S2W/BT product page](https://pixiepartners.com.au/product/sal-pixie-multiway-switch-s2wbt/) | [Downloads the installation manual](https://pixiepartners.com.au/wp-content/uploads/2019/12/SAL-Pixie-Multiway-Switch-s2w-bt-installation-instruction.pdf)

 

 Did this help?

**Leave a comment below if you still need more help.**

 

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