On a side note about Oregon Scientific, If you live outside the U.S., do not order from them! They use a third party called International Checkout for these orders. They have lots of bad reviews and rip you off with CC processing fees and pre paid duties and bad customer service, even if you ship within the states. OS charges 6.95 state to state, IC charged over 60, saying it was a processing fee for non U.S credit card along with shipping.