現在手機因為娛樂需求，螢幕越做越大，然而回歸到最基本的功能-講電話時，將如磚頭般大小的手機靠在耳邊呢喃細語，似乎不是太方便；加上很多情境並不允許手持電話，除了藍牙耳機輔助外，你有試過用手指代替話筒嗎？

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Sgnl 為一款智慧錶帶，使用者只需按下錶帶上的按鈕後，將手指放在耳朵外圍，即可代替話筒進行語音溝通。其技術原理為骨傳導技術，能透過錶帶上的身體傳導位元（Body Conduction Unit，BCU），將聲音訊號轉為震動資訊；當使用者用手指按住耳朵在耳腔內產生共鳴，即能還原聲音訊號。其中的音量及音質取決於 BCU 的位置，因此建議配戴在手腕處取得最佳通話品質。由於這種震動只是物理性震動，對身體不會造成任何危害。

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除了單獨使用外，也可搭配 Apple Watch 等智能手錶，並利用藍芽與 Android 4.4 及 iOS 9 版本以上的智慧型手機連接。其他的附加功能包括追蹤步伐及健康數據，並記錄在 Sgnl 的 APP 上。Sgnl 重量僅 116 克，可防塵及防強力噴水，完全充電需 3 小時，待機最長可達 7 天，最長通話時間為 4 小時。與傳統電話相比更安靜有隱私，還可接通Line、WhatsApp 等通訊軟體的網路電話。然而因 Sgnl 專為電話的音頻設計，所以不適合用來聽需要更高音頻的音樂。

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Sgnl 由來自韓國的 Innomdle Lab 研發，2014 年起在 Samsung 的內部加速計畫 C-LAB 培育，並獲得競賽第一名。2015 年正式成為第一家從三星分拆出來的獨立公司，目前 Samsung 僅提供少量的種子基金，並沒有董事會席位。

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募資方面，在 Indiegogo 及 Kickstarter 平台上皆成功達標，產品保固一年，共計有黑、白、藍、棕、灰、綠六種顏色，早鳥最佳優惠為 99 美元（約 2,969 新台幣）。原先預計於 2017 年 2 月出貨，卻因製造上遇到問題延宕至今，有預購的朋友可隨時關注的出貨訊息。

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