# YoLink YS7704 Door & Window Sensor, 3-Pack

The YoLink YS7704 Door & Window Sensor 3-pack is a battery-powered wireless contact-sensing kit for monitoring doors and windows. It uses LoRa and can be used with a hub for full functionality, or paired directly with a compatible siren for a more limited standalone setup.

- [Original product page](https://best-deals.pro/product/yolink-ys7704-door-window-sensor-3-pack)
- [View offer](https://best-deals.pro/visit/yolink-ys7704-door-window-sensor-3-pack)
- Market: US
- Language: en-US
- Currency: USD
- Brand: YoLink
- Model: YS7704-UC\*3
- Category: Electronics > Smart Home & Security > Alarms & Sensors
- Price: 40.79 USD
- Previous price: 47.99 USD
- Discount: 15%
- Price checked: 2026-11-14T09:36:50.808Z
- Rating: 4.5 / 5
- Reviews: 3267

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- Three sensors are supplied without a hub, according to the listing's selected configuration.
- The listing describes app alerts and a door-left-open reminder, with a hub required for full functionality.
- Device-to-device pairing with a siren is offered as a hub-free option, but requires compatible additional devices.
- The manufacturer claims up to a quarter-mile open-air LoRa range. Actual placement and conditions may affect reach.

## Pros

- A three-sensor set can cover several doors or windows without buying sensors individually.
- Mounting tape is listed for installation, and the manufacturer describes QR-code setup.
- The claimed battery life of 2 years may reduce routine battery changes.
- Direct sensor-to-siren pairing is described for certain actions even when internet service or power is down.

## Cons

- Full functionality requires a hub and an internet connection, so this no-hub pack alone does not provide the complete connected setup.

## Specifications

### Identity
- Brand: YoLink
- Model: YS7704-UC\*3
- Pack configuration: 3-pack without hub
### Sensor and connectivity
- Sensor technology: LoRa
- Wireless connection listed: Wireless
- Control methods listed: App
- Alert type listed: Motion
- Maximum range: 2034 feet
- Compatible device: Smartphone
### Power and battery
- Power configuration: Battery Powered
- Battery type: Alkaline
- Battery life listed: 2 years
- Voltage: 3 volts
### Installation and weight
- Installation method: Mounting Tape
- Weight listed: 66 g

## Before you buy

- The listing's Alert Type field says “Motion,” while its product description presents the devices as door and window contact sensors. It also gives a 2034-foot maximum range while describing a quarter-mile open-air range. The headline identifies a three-pack without a hub, while the built-in-media list includes a siren and the description discusses separately paired sirens. Confirm the sensor alert behavior, applicable range conditions and selected package contents before buying. The stated 2-year battery life differs from the description's claim of 2+ years standby.

## A good fit for

- People who want several battery-powered sensors for doors, windows or other openings and are prepared to configure a compatible hub or siren.
- Buyers looking for a LoRa-based sensor system for locations where they want to try a longer-range connection than Wi-Fi.

## Less suited to

- Anyone seeking a complete hub-based smart-home setup in the box, since the selected listing says without hub.
- Buyers who need a standalone audible alarm from the sensors without adding a compatible siren or hub.

## Customer feedback

Customer feedback highlights easy setup, useful alerts and smart-home connectivity, including mentions of Alexa, Home Assistant and IFTTT. Customers also report notifications arriving within seconds and describe the system as versatile. These are reported experiences, not guaranteed behavior. For buyers considering this LoRa sensor kit, the positive feedback is relevant to everyday monitoring, while the reported reach is distinct from the listing's much higher open-air maximum and does not settle performance at a particular site.
- Positive themes: Customers describe installation as easy and report quick setup.
- Positive themes: Feedback mentions useful opening notifications and smart-home integrations.
- Positive themes: Customers report positive experiences with versatility and value.

## Frequently asked questions

### Does this three-pack include a hub?
The selected configuration is described as a three-pack without a hub. The listing says a hub with an internet connection is required for full functionality.
### Can the sensors work without a hub?
The manufacturer describes direct device-to-device pairing with a compatible siren as a limited alternative. That setup requires a separately obtained compatible device.
### What battery life does the listing claim?
The specifications list 2 years. The description separately claims 2+ years of standby, so treat battery life as an estimate rather than a guaranteed duration.
### Are batteries included?
The product description claims six AA batteries are included and preinstalled. The selected configuration and package list should be checked, because the listing also has conflicting kit details.

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## Add-ons

- [YoLink SpeakerHub Smart Home Hub with Voice Alerts, YS1604 \| Hear Custom Sensor Alerts, Alarm Tones, Works with Home Assistant, LoRa YoLink Protocol Up to 2034 Feet, Wi-Fi Required](https://best-deals.pro/visit/yolink-ys7704-door-window-sensor-3-pack)
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## Images

![YoLink YS7704 Door & Window Sensor, 3-Pack — 1](https://best-deals.pro/i/i9ioazqGuCNBJc2425fxiSpKK5ycV-5q8-19Vt36kpFIwa86gjGBT3-bRR3T7UejF8IrfxRDJpmMxy0YGs_CO2kitoXflBTsapAlwLWUg75iVlu6dXgUEod9.jpg)

![YoLink YS7704 Door & Window Sensor, 3-Pack — 2](https://best-deals.pro/i/bzLd66L_uEsPtvbbFmh4lFgQMsQ5S9AFlGhLzm0uSEVSNDoAQEzSEjOIj13AP2T_hacW-KgIun_j6WlPstqBCuYXnvtmDgcFpeVjlEKUYRWt4LRlDdKGiyvj.jpg)

![YoLink YS7704 Door & Window Sensor, 3-Pack — 3](https://best-deals.pro/i/IJ6wP1ViqFzJrTP3MsgS1v23av--nJgKL-CKnPRyRR0a-Uj52H8J5GrvMk3eLW4ulbRXt7yyty9Uixa2xtFE7jsg8k9kyvY935E2RVwS1ywfjnMdlJ8QC-xc.jpg)

![YoLink YS7704 Door & Window Sensor, 3-Pack — 4](https://best-deals.pro/i/8KDNA4ADowxLmPQup3QpSbuCxYDRLJ5wct2Lwe1ZCe2JdCgHjOcqqQgD79cle5TQcSoQSsDrJPwJqlS4zb3HqUqvRWoomsLJArth5vC5tYSbxx24NDSv2AHW.jpg)

![YoLink YS7704 Door & Window Sensor, 3-Pack — 5](https://best-deals.pro/i/IJlQgVpXa-szzkXRazYkqjyVeyRDG2o0Fx60jSnrJtHHMSTFasP5l5ihKF_8NhU9pHDb3cIZLHaVJCBgn1gTkdEogq8YfZk1bT4weRNSpIJT4z5bNBPNYrEL.jpg)

![YoLink YS7704 Door & Window Sensor, 3-Pack — 6](https://best-deals.pro/i/pwSQ2C8rTAn5wdTwYJEqDnImSrmI9kzzzYB-m4k8u8Ob1Ub7M5Z0F0ZGX9QSwP8Dd_kKPNwDay2qUpr63JcjTFl0IcZ6Ip3l_UTC2pMbCZTnyMXbF_AwfRX7.jpg)

![YoLink YS7704 Door & Window Sensor, 3-Pack — 7](https://best-deals.pro/i/6jLzzZD9xKabDjnjCo5sXJBsSc0ylANbQ9rkP2PzUtVdS4kbCez1Oq_XtPoDIN1OOnsbKpbg_RB3XdFXRwLmXH5Mia-eH7d4UKagv_0vBaPBoThyj9E8qjPQ.jpg)