will these work with the zigbee hub built in to Amazon Echo Dot V4 ?

No, YoLink device uses the longest range wireless technology LoRa, not zigbee and other short range wireless technologies. Thanks!

How can i link this to a simple "wall" led. Like a red light notification?

You would need to be a little creative. You can use the YoLink Relay (https://www.amazon.com/YoLink-Relay-Super-Compatible-Google/dp/B08RBSPP4F?ref_=ast_sto_dp&th=1) to turn on a low voltage LED light. If the LED is AC powered there are several YoLink smart plugs/outlets that could be used.

Does it work when mounted on metal door?

Yes, it works when it is mounted on metal door.

Has anyone install this on a window that would be for example broken and opened during a robbery I’ve seen a lot of videos with this on peoples doors?

It is a window/door sensor, or you can consider our YS7201-UC Vibration Sensor to get a notification in case the window was broken, and you can use the sensor to trigger YS7103-UC/YS7104-UC Indoor/Outdoor Siren to scare somebody away. Thanks!

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YoLink Door Sensor, 1/4 Mile World's Longest Range Smart Home Wireless Window Door Sensor, Smart Sensor with Remote Monitor App Notifications Open Reminder - YoLink Hub Required

YoLink Door Sensor, 1/4 Mile World's Longest Range Smart Home Wireless Window Door Sensor, Smart Sensor with Remote Monitor App Notifications Open Reminder - YoLink Hub Required

Product ID: 458204315

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Details

Brand
YoLink
Colour
White
Power source
Battery
Compatible devices
Home Systems
Item dimensions L x W x H
9.4 x 4.7 x

📡1/4 mile LoRa range

📲Real-time app alerts

🔋5+ years battery life

Description

📡 Stay ahead with the world’s longest-range smart door sensor—because your home deserves the best.

SIMPLE DIY INSTALLATION - Wireless, lightweight, and user-installable—secure your doors and windows without hassle.
INSTANT SMART NOTIFICATIONS - Receive customizable real-time alerts via app, SMS, or email—stay connected no matter where you are.
UNMATCHED LONG RANGE COVERAGE - Industry-leading 1/4 mile wireless range powered by LoRa tech—perfect for sprawling properties and hard-to-reach spots.
SEAMLESS SMART HOME INTEGRATION - Works with Alexa and IFTTT through YoLink Hub for advanced automation and ultimate control.
EFFORTLESS YEARS LONG BATTERY LIFE - Low-power design means up to 5 years on standard AAA batteries—set it and forget it.

The YoLink Door Sensor leverages cutting-edge LoRa technology to deliver the longest wireless range in the market at 1/4 mile, ensuring reliable monitoring even in Wi-Fi dead zones like basements and outbuildings. Powered by low-energy AAA batteries, it offers up to 5 years of maintenance-free operation. With real-time customizable notifications via smartphone app, SMS, and email, it keeps you instantly informed of door/window status. Integration with Alexa and IFTTT through the required YoLink Hub unlocks advanced smart home automation, making it a versatile and indispensable security sensor for modern homes.

Specifications

Manufacturer	YoSmart
Part Number	YS7704
Product Dimensions	9.4 x 4.7 x 3.3 cm; 70 g
Batteries	2 AAA batteries required. (included)
Item model number	YS7704
Colour	White
Style	Without Hub
Material	Plastic
Power Source	Battery Powered
Installation method	Wireless (User-Installable)
Plug profile	Door Mount
Certification	CE
Included Components	Batteries, Detector
Batteries included?	Yes
Batteries Required?	Yes
Battery Cell Type	Alkaline
Battery description	Alkaline
Average Battery Life	5 years
Item Weight	70 g

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