Heallily Switch Decade Variable Resistance Box Adjustable, 9999 Ohm Black Product Details Package Include Characteristics Goods Description Substitution: the variable resistance box teaching instrument is suitable and wonderful for school, laboratory use. Resistor: decade resistance box, made of plastic material, flexibility and excellent durability, easy to use, for service life. Variable: a selection of professional variable resistance box, which has good stability and high accuracy. Traffic light: lightweight, easy and convenient to carry and store when not in use without any effort. Chakra button stones: it is used to measure the unknown resistance. it is used to measure the force and internal resistance of the power supply. 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.