Color:white black<br />Packing list:<br />crystal gift box・ magic ring<br /><br /> Products description<br /><br />The Jakcom smart ring is a Wearable electronic components・ operate the mobile function and share the data by NFC wireless frequency communication technology ・ the functions of the advanced design as following: Private Note ・Screen lock ・APP lock・ Quick start・ share business card・ share internet link・ share the text and share online file. Original Health Module<br /><br />can improve human performance effectively.  The product shape is designed according to the international popular elements・ created by the pure medical titanium・ no need to charge・ high waterproof・ and suitable for any people at any time.<br /><br />Specification:<br />Model:JAKCOM-R3F <br />Frequency:13.56MHZ<br />Range to cover:1.5cm<br />Work temperature:-50~+80  <br /> <br />Instructions for use:<br />a) First・ check if your smartphone has NFC function. It can usually be found in the system settings. If no relevant options are found・ contact with the manufacturer post-sale support・ or search on Google if the smartphone model has NFC function and confirm its NFC area.<br />b) If your smartphone has NFC function・ turn on the NFC switch・ search your app store for the software which apply NFC・ download and install them.<br />c) Start the NFC APP・ perform actions according to the instructions.<br />d) Since NFC is a near field communication technology・ make sure to place the t