n The product is shipped based on the color or size of the main image of the product page.Note: If you want to control the device by remote controller indoors you need to buy an extra 433MHz RF remote controller.Overview:This RF Bridge can convert most of the 433MHz RF Remote Controllers into WiFi wireless. By adding the RF Bridge to App via WiFi you can add up to four 1-4 buttons 433MHz Wireless RF Remotes to the RF Bridge device. After pairing the RF Remote buttons with RF controlled devices you can directly control maximum 16PCS RF controlled devices on the App through network. It can be used for most of the 433MHz RF Remote controlled products like RF controlled switch RF controlled socket RF controlled bulb RF controlled door opener etc. Even more exciting is that it can work with door magnetic sensor human body IR sensor and more other sensors to realize security alarm and allowing you to DIY smart scenes. It can make your home smarter.Features:*App Support: Free iOS and for Android mobile App eWeLink.*Convert 433MHz RF Remote controller to App via WiFi.*Make 433MHz RF devices App remote controllable.*Supports adding up to four 433MHz RF Remote Controller/ RF Curtain Switch / RF Alarm.*Supports control up to sixteen 433MHz RF devices.*Remote ON/OFF: Turn connected 433MHz RF devices on/off remotely from anywhere on the App.*Timing: Supports scheduled/countdown timing tasks to turn on/off at specified time.*The receiving supports fixed code 433 frequency like PT2260 PT2262 PT2264 EV1527 etc.*Voice Control: Works perfectly with Amazon Alexa and for Google Home.Specifications:Power Supply: USB 5VSupported Radio: 433MHz RFSupports fixed code 433 frequency: PT2260 PT2262 PT2264 EV1527 etc.Not support to learn rolling code and dynamic codeWireless Standard: WiFi 802.11b/g/nSecurity Mechanism: WPA-PSK/WPA2-PSKProduct Size: 63*63*21 (mm)Package Information:Package Size: Approx. 6.6*6.6*2.4cm/2.59*2.59*0.94inPackage Weight: Approx. 40g/1.41ozPacking List:1 * SONOFF RF Bridgen