We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Small green circuit board with four black relay cubes and a Bluetooth module, bare PCB finish

KW-Commerce

KW-Commerce DSD TECH SH-BT04B 4 Channel Bluetooth 4.0 Relay V2

SKU CH-NHRC-QVYDG

Four-channel Bluetooth 4.0 relay with timer and security-code functions, switching AC 250 V or DC 30 V loads up to 600 W per channel from a 5 V or 12 V supply.

  • Control four circuits wirelessly via Bluetooth 4.0
  • Secure operation with authentication and programmable timer functions
  • Switch AC loads up to 250 V and DC up to 30 V per channel
  • Power the module from 5 V or 12 V DC supplies
  • Free iOS and Android app enables remote control up to 10 m

4-Channel Bluetooth 4.0 Relay Module

This second-generation DSD TECH relay adds timer functions and security-code authentication to four independently switched channels. It accepts DC 5 V or 12 V supply and can switch loads up to DC 30 V or AC 250 V per channel. The built-in Bluetooth 4.0 BLE module pairs with iOS devices and Android 4.3 or later handsets. Maximum load per channel is 600 W.

Check your control device and load requirements

Verify that the phone or tablet you will use runs iOS or Android 4.3 and newer and supports Bluetooth 4.0 BLE; the module is not compatible with Bluetooth 2.0 SPP devices. Confirm each connected load stays within the 600 W per-channel limit and that the supply voltage you provide matches the DC 5 V or 12 V input range. The relay only outputs control signals, so plan for separate power wiring to the loads.

Fits automation projects needing wireless switching

The compact board mounts in an enclosure and connects to the loads you want to control — lights, pumps, fans or other appliances — while drawing minimal power from the 5 V or 12 V source. The free DSD TECH Switch app handles scheduling and secure access, and open programming instructions let you write custom control software. Up to 10 m range in open space keeps the controller out of sight.

Highlights

  • Control four circuits wirelessly via Bluetooth 4.0
  • Secure operation with authentication and programmable timer functions
  • Switch AC loads up to 250 V and DC up to 30 V per channel
  • Power the module from 5 V or 12 V DC supplies
  • Free iOS and Android app enables remote control up to 10 m

Specifications

No published specifications for this item yet.

Questions about this item

Does the 4-channel relay board ship with a power supply or do I need to provide 5 V or 12 V DC myself?

The board requires an external 5 V or 12 V DC source; no power supply is included.

Which app should I install to use the timer and security-code features on iOS or Android?

Search for "DSD TECH Switch" in the App Store or Google Play; it provides the timer and security-code functions.

What does the 600 W per-channel rating mean when I connect a 250 V AC load?

Each channel can switch up to 600 W at 250 V AC, but the relay only outputs a control signal and does not supply power.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.