????要安裝這款煙霧探測(cè)器的話，你需要一臺(tái)運(yùn)行iOS或安卓系統(tǒng)的手機(jī)或平板設(shè)備、一個(gè)Wi-Fi網(wǎng)絡(luò)、Nest的配套應(yīng)用程序，以及幾分鐘的時(shí)間。屆時(shí)會(huì)有聲音和畫(huà)面來(lái)指導(dǎo)你完成整個(gè)安裝過(guò)程——其中一部分來(lái)自移動(dòng)應(yīng)用，另一部分來(lái)自設(shè)備本身。安裝到其中一個(gè)環(huán)節(jié)時(shí)，這款應(yīng)用還會(huì)讓你用手機(jī)掃描設(shè)備背面的二維碼來(lái)對(duì)設(shè)備進(jìn)行確認(rèn)。我測(cè)試了兩臺(tái)Protect，但我的iPhone只掃出了其中一臺(tái)的二維碼，好在另一臺(tái)也可以通過(guò)手工輸入產(chǎn)品驗(yàn)證碼來(lái)驗(yàn)證。

????隨后，這款應(yīng)用會(huì)指導(dǎo)你把手機(jī)聯(lián)入Protect發(fā)出的一個(gè)小型無(wú)線網(wǎng)絡(luò)。接下來(lái)，它會(huì)要求獲得你的家用Wi-Fi網(wǎng)絡(luò)的授權(quán)，以便讓Protect連接到互聯(lián)網(wǎng)。每安裝一臺(tái)Protect，你都得重復(fù)一遍這個(gè)流程。

????只有在Protect連接到你的無(wú)線網(wǎng)絡(luò)后，你才能把它真正地安裝到墻上或天花板上。這個(gè)過(guò)程持續(xù)時(shí)間和難易程度取決于你家的電路。我住在一套沒(méi)有安裝煙霧探測(cè)器電路的老房子里，所以我買(mǎi)了一套電池版本的Protect（跟電線提供電力的Protect價(jià)格是一樣的）?；藥追昼姇r(shí)間才把支架和設(shè)備裝好。

????當(dāng)Protect首先探測(cè)到煙霧時(shí)，按理說(shuō)它會(huì)通過(guò)閃爍的黃光和語(yǔ)音口令來(lái)進(jìn)行早期預(yù)警。但是有兩次我意外地觸發(fā)了警報(bào)（我真的是一位不錯(cuò)的廚師，我發(fā)誓），但是Protect省略了報(bào)警程序，直接啟用緊急模式。家里的兩臺(tái)Protect開(kāi)始說(shuō)話了：“情況緊急，廚房里有煙霧！”它們的光環(huán)開(kāi)始發(fā)出紅光，像火災(zāi)警報(bào)一樣的警笛聲在房子里回響，我的iPhone也收到Nest應(yīng)用發(fā)來(lái)的報(bào)警。我馬上按下Protect的按鈕停止了警報(bào)。不過(guò)，10分鐘后，雖然房間里的煙霧已經(jīng)散盡了，但Protect再次發(fā)出警報(bào)聲。

????在可能發(fā)生火警的情況下，過(guò)度小心也不為過(guò)。但是Nest公司稱(chēng)，Protect的賣(mài)點(diǎn)之一就是它的早期預(yù)警能力。但是在我實(shí)測(cè)過(guò)程中，我從來(lái)沒(méi)有收到過(guò)早期預(yù)警。

????除了具備探測(cè)煙霧功能，Protect還可以作為夜燈使用，在夜里發(fā)出柔光。在一個(gè)黑暗的房間里，如果它利用內(nèi)置的運(yùn)動(dòng)探測(cè)功能，探測(cè)到附近有人運(yùn)動(dòng)，其光環(huán)就會(huì)變成白色。如果與Nest的恒溫器協(xié)作使用，那么當(dāng)你不在家的時(shí)候，這些傳感器可以自動(dòng)優(yōu)化暖氣和冷氣——不過(guò)它不能保證完全。比如，恒溫器如果安裝在走廊這種你不經(jīng)常經(jīng)過(guò)的地方，哪怕你在家，傳感器可能自動(dòng)進(jìn)入外出模式。但不管怎樣，運(yùn)動(dòng)探測(cè)畢竟是一個(gè)非常細(xì)膩的功能，還是豐富了Protect的整體使用體驗(yàn)。

????這也是為什么我和妻子都同意購(gòu)買(mǎi)一臺(tái)Protect的原因。我們最近搬到了一幢非常大的房子里，這臺(tái)新買(mǎi)的Protect也改善了我們已有的Nest恒溫器的性能。而那臺(tái)恒溫器正是安裝在走廊里。另外不論我身在何處，家里一旦有了火災(zāi)隱患，Nest就會(huì)隨時(shí)通過(guò)移動(dòng)APP通知我，這種能力也的確算是錦上添花。

????即使Protect的價(jià)格已經(jīng)下降到99美元，它還是太貴了，尤其是讓那些只關(guān)心防火功能的人望而卻步。（家居建材賣(mài)場(chǎng)Lowe’s賣(mài)的一款普通的煙霧探測(cè)器只有25美元。）如果你已經(jīng)有了一臺(tái)Nest的學(xué)習(xí)型恒溫器，也許你就不會(huì)覺(jué)得這個(gè)價(jià)格過(guò)分離譜。不過(guò)，在試用了Protect三個(gè)月后，我還是挺喜歡那些附加功能。它的夜燈、綠色的OK燈、語(yǔ)音控制功能、移動(dòng)報(bào)警功能，都是以前你不會(huì)想到會(huì)出現(xiàn)在煙霧探測(cè)器上的功能，但是它們的確會(huì)讓你覺(jué)得家里變得更安全了。對(duì)于一種你永遠(yuǎn)不希望它真的派上用場(chǎng)的設(shè)備來(lái)說(shuō)，這些都是不錯(cuò)的功能。（財(cái)富中文網(wǎng)）

????譯者：樸成奎

????It takes a smartphone or tablet running Apple’s iOS or Google’s Android, a Wi-Fi network, the Nest companion app, and a few minutes of time to set up the Protect. A combination of voice commands and illustrations—some from the app, some from the device itself—guide you through the process. At one point, the app prompts you to scan a QR code on the back of the unit using your smartphone’s camera to identify each device. Of the two I tested, only one worked with my iPhone, but thankfully the app allows for manual entry of the unit’s unique key.

????After that, the app instructs you to connect your smartphone to a small wireless network emitted from the Protect, after which the app will request the credentials for your home Wi-Fi network to connect the Protect to the Internet. You must repeat this process for each Protect you install.

????Only after each Protect is wired up digitally can you actually install the unit in your wall or ceiling. The duration and difficulty of this process depends on the type of electrical connection in your home. I live in an older home that lacks a hard-wired network for smoke alarms, so I made sure to purchase the battery powered version of the Protect. (The hard-wired version costs the same.) It took a few minutes to mount the bracket and unit.

????When it first begins detecting smoke, the Protect is supposed to give early warning to danger with a combination of a pulsing yellow light and a verbal command. On the two occasions I managed to accidentally set off the alarm—I’m a really good cook, I swear—the Protect skipped the warning alert and went headlong into emergency mode. The two units in my house began talking—”Emergency, there’s smoke in the kitchen!”—their light rings lit up bright red, a familiar fire alarm sound echoed throughout the house, and my iPhone received alerts from the Nest app. I was able to quickly hush the alarm by pressing the center button, but was surprised when the Protect alerted me 10 minutes later, once the smoke had cleared from the room.

????In a situation where there might be a fire, it’s smart to be overly cautious. But one of the selling points Nest uses for the Protect is its ability to provide early warnings. In my testing, I never received one.

????Aside from its primary purpose, the Protect also moonlights as a nightlight. Using its built-in motion detectors, the light ring will turn white when it senses nearby movement in a dark room. In conjunction with a Nest thermostat, those sensors help optimize heating or cooling when you’re not home—though it’s not foolproof, and a thermostat positioned in a low-traffic area like a hallway might enter auto-away mode even when you’re home. At any rate, motion detection is a very subtle feature that helps round out the overall Protect experience.

????It’s also the sole reason my wife and I elected to purchase a Protect. We recently moved into a fairly large house, and the added detector improves the performance of our existing Nest thermostat, which is mounted in—you guessed it—the hallway. The ability of the mobile app to alert me to trouble wherever I am was icing on the cake.

????Even at $99, the price for Protect is steep, and one that is prohibitive for most people interested in its primary function. (A run-of-the-mill combo device will run you about $25 at Lowe’s.) If you’re a Nest Learning Thermostat owner, the equation is a little less lop-sided. Still, after using the Protect for three months, I appreciate the additional features it incorporates. The night light, green OK light, voice commands, and mobile alerts are all capabilities you never think you’d want in a smoke detector, but they do a great job helping a home feel safer. Not a bad feature of a piece of tech you hope to never have to use.