What is "Estimated Delivery Date?" This is an approximate delivery date and is not a guarantee. Delivery estimates are available only for select items to be delivered in the contiguous United States, excluding APO/FPO addresses and PO boxes. Your final shipping cost will be available at checkout. With a variety of bright and bold colors to choose from, you can now answer your calls, old-school style, with the Retro POP Phone Handset. Simply attach the handset to a mobile device with a 3.5 mm jack and begin listening to and answering your calls.... more With a variety of bright and bold colors to choose from, you can now answer your calls, old-school style, with the Retro POP Phone Handset. Simply attach the handset to a mobile device with a 3.5 mm jack and begin listening to and answering your calls. With the Retro POP Phone Handset, convert your ordinary Smartphone and mobile phones into an old school telephone Enjoy the convenience of a single button for answering and hanging up calls, along with volume control, on one handset Make this handset your ultimate conversation piece The handset is designed to feel light and comfortable with a soft, rubberized texture for an easy grip Take this handset with you anywhere on the road or at home and store it easily in your purse or briefcase This Retro POP Phone Handset is only compatible with the Apple iPhone (all Generations), iPad (all Generations), and other Apple products The single button function is