The wireless ALRS, which stands for Advanced Load Radio System, has several operating features including 4 units of measurement, 6 digit display and peak hold. There is no on/off switch on the load shackle as this function is carried out on the ALRS. If you want to buy Wireless load Shackle in Australia, consider visiting our official website. https://digitalnomadads.com/for-sale/everything-else/book-wireless-load-shackle-that-is-efficient-for-load-monitoring_i369516