Hiletgo 37 Sensors Assortment Kit 37 Sensors Kit Sensor Starter Kit For Arduino Product Details 37 Sensors Assortment Kit 37 in One Sensors Starter Kit for Arduino MCU Education Package included: Note: Please contact us if you need the files of some one sensor. 37 Sensors Assortment Kit in One Starter Kit 37 Sensors Assortment Kit for Arduino MCU Education Touch sensor moduleHeartbeat detection module Infrared sensor receiver module Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.