Eiechip 10-Piece Power Resistor Set For Nest Hello Doorbell, Aluminum Shell Product Details ?Small Size of Large Power. ?Good Flexibility: Multiple Choice, Good for Machinery Protection, More Convenient for Users to Install. ?Heat dissipation: Shell is Made of Aluminum Alloy, A Heat Radiating Groove on The Surface, Suitable for Cooling Plate Installation, Can be Used in Atrocious Environment. ?Ability: High Temperature Resistant, Strong Overload Capacity With High Weather Resistance, High Precision, Low Standard Induction Resistance, High Stability, Strong Architecture. ?Widely Used: Ring Doorbell, Power Supply, Transducer, Audio, Frequency Converter, Frequency Divider, Elevator, Arena Audio And Automation Equipment In Industry. 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.