SONOFF DW2 Door/Window Sensor ($9.99)

This price should be illegal: $9.99 with a coupon! (at Banggood). Quiescent current: ≤ 40 μA;, Working Voltage: DC3V (2x 1.5V battery, Not included);, Material: PC V0;, Wi-Fi: IEEE 802.11 b 2.4GHZ;, Battery Model: AAA 1.5V;.
Updated: 29-07-2025

Banggood

Warehouse in China.
Link: SONOFF DW2 Door/Window Sensor
Price: $9.99

Additional Banggood coupons:
1. First page
2. Second page

Other warehouses/versions

This item is available in 1 another warehouse/version!
1. Europe – SONOFF DW2 Door/Window Sensor [EU] ($-3)

Aliexpress

There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price: Open

Image	Product (link)	Price	Coupons
	SONOFF DW2 Wireless RF Door Window Sensor APP alarm Must Work With Sonoff RF Bridge Diy Automation SmartHome Security Protection	$4.81	–
	SONOFF DW2-RF – 433MHz RF Wireless Door/Window Sensor Smart Home Security Alarm Work With SONOFF RF433MHz Bridge EweLink IFTTT	$4.99	–
	SONOFF DW2 RF 433Mhz Wireless Door Window Sensor Notification Alerts For Smart APP Home Security Alarm Works SONOFF RF Bridge	$5.83	–
	SONOFF DW2 WiFi Magnetic Door/Window Sensor Smart Home Security EWeLink Remote Alerts Notification Work With Alexa Google Home	$6.37	–
	Sonoff DW2 RF Door/window Sensor 433 Hub Required Door Open Status Security Alarm Work With Ewelink App Alert Notification Ifttt	$6.40	–
	1-10 PCS Itead SONOFF DW2 RF Door Window Alarm Sensor Wireless Magnetic Door Detector Anti-Theft Alarm Smart Home Security	$7.37	–
	SONOFF RF Bridge R2 433MHz Gateway DW2 PIR3 Door Window Motion Sensor Voice Control Smart Scene via eWeLink Google Home Alexa	$7.37	–
	SONOFF DW2-RF 433MHz Wireless Door/Window Sensor Smart Home Security Alarm Sensor Smart Scene Works With SONOFF RF BridgeR2	$7.37	–
	1-10PCS SONOFF DW2-RF 433MHz Wireless Door Window Sensor Works with SONOFF RF Bridge EV1527 Smart Scene Home Secuirty Devices	$7.37	–
	Itead SONOFF RF Bridge 433MHz Wireless Wifi Remote Control PIR3 Motion Sensor DW2 Door Window Sensor for Smart Home Automation	$7.37	–
	SONOFF DW2 WiFi Wireless Security Door Window Sensor Alarm Detector 433MHZ RF Smart Scene EWeLink App Remote Smart Home Security	$7.56	–
	SONOFF DW2 WiFi Magnetic Door/Window Sensor Smart Home Security EWeLink Remote Alerts Notification Work With Alexa Google Home	$7.61	–
	SONOFF DW2 WiFi Magnetic Door/Window Sensor Smart Home Security EWeLink Remote Alerts Notification Work With Alexa Google Home	$7.63	–
	SONOFF DW2 WiFi Wireless Door/Window Sensor Open/close Detector App Real Time Alarm Work With Alexa Google Home Assistant Tomato	$7.78	–
	SONOFF DW2 Wifi Wireless Door/Window Sensor Smart Home Automation Module No Gateway Needed Status Sync Easy Installation Sensor	$7.87	–
	SONOFF DW2 Wifi Wireless Door Window Sensor Open / Closed Detectors E-WeLink APP Alert Notification Smart Home Security Alarm	$7.98	–
	SONOFF DW2 Wifi Wireless Door Window Sensor Open / Closed Detectors E-WeLink APP Alert Notification Smart Home Security Alarm	$8.02	–
	SONOFF DW2 WiFi Wireless Door/Window Sensor Detector Smart Home Security Alarm Smart Scene eWeLink APP Alert Notification	$8.13	–
	SONOFF DW2 WiFi Wireless Door/Window Sensor Detector Smart Home Security Alarm Smart Scene EWeLink APP Alert Notification	$8.17	–
	SONOFF DW2 WiFi Wireless Door/Window Sensor Open/close Detector App Real Time Alarm Work With Alexa Google Home Assistant Tomato	$8.28	–
	Sonoff DW2-WiFi Wireless Security Door/Window Sensor Home Sercurity Alarm Work With eWeLink APP Support Sonoff Devices IFTTT	$8.60	–
	Itead SONOFF DW2 WiFi Wireless Door Window Sensor Detector WiFi App Notification Alerts Smart Home Security Works with e-WeLink	$8.60	–
	1/2/3/5/10 PCS Itead SONOFF DW2 Smart WiFi Door Sensor Door Window Dedector e-WeLink App Notification Alerts Smart Home Security	$8.60	–
	Sonoff DW2-WiFi Wireless Security Window Door Sensor Home Sercurity Alarm Work With eWeLink APP Support Sonoff Devices IFTTT	$8.60	–
	SONOFF DW2 Wifi Wireless Door Window Sensor Open / Closed Detectors E-WeLink APP Alert Notification Smart Home Security Alarm	$8.60	–
	SONOFF DW2 WiFi Wireless Door Window Sensor Detector e-WeLink App Notification Alerts For Smart Home Security Bluetooth Pairing	$9.83	–
	SONOFF DW2 RF 433Mhz Wireless Door Window Sensor App Notification Alerts For Smart Home Security Alarm Works SONOFF RF Bridge	$11.35	–
	SONOFF RF Bridge R2 433MHz DW2 Door Window PIR3 Motion Sensor SONOFF RF Sensor Kit Works With eWeLink APP Google Home Alexa	$14.06	–
	SONOFF DW2 WiFi Wireless Door/Window Sensor Detector Smart Home Security Alarm Smart Scene eWeLink APP Alert Notification	$14.09	–
	SONOFF RF Bridge R2 433MHz DW2 Door Window PIR3 Motion Sensor SONOFF RFR2 Smart Switch Works With eWeLink APP Google Home Alexa	$15.37	–
	New SONOFF DW2 WiFi Door Window Sensor Open/close Detector App Real Time Alarm Work With Alexa Google Home Assistant Ewelink	$17.20	–

Click here to search by yourself. Here are coupons that you can use.

Price history and price alert

Well, you won’t see price history chart, coz we have only 1 database record for this item (and price was $6.99).
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).
Price Alert