Eco-Worthy Hall Sensor Ac To Dc Transmitter, Input 300A Additional Accessories Product Details [ECO-WORTHY Hall Sensor] 99% high-precision monitoring, additional accessory for ECO-WORTHY 300A Battery Monitor. [Bidirectional Current Monitoring] ECO-WORTHY battery monitor supports dual Hall Sensors to collect both input and output current separately, and display input and output power. 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.