Plug In Doorbell - Safeguard Supply Dependable 3/4 Mile Long Range Wireless Product Details Unique 433MHz wireless door bell signal penetrates multiple floors walls even thick reinforced concrete, brick stone. USA Engineered Wireless Door Chime With Commercial Doorbell Features: Durable, ABS IP65 waterproof door bell button with green LED. No Limit On How Many Doorbell Chime Wireless Receivers You Can Add: Unlike other doorbell chimes, you can add as many receivers as necessary to provide the coverage you need as far as 4000' away. Expand By Adding Select Safeguard Supply ERA Products: outdoor motion sensor (ERA-DSTX), indoor motion sensor (ERA-PIR), door contact (ERA-UTX), portable receiver (ERA-VPRX), power receiver (ERA-DCRX). 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.