Headphones let a single user listen to an audio source privately, in contrast to a loudspeaker, which emits sound into the open air for anyone nearby to hear. Headphones are also known as earspeakers, earphones or, colloquially, cans. Circumaural and supra-aural headphones use a band over the top of the head to hold the speakers in place. The other type, known as earbuds or earpieces consist of individual units that plug into the user's ear canal. In the context of telecommunication, a headset is a combination of headphone and microphone.
Osmium is usually sold as a minimum 99.9% pure powder. Like other precious metals, it is measured by troy weight and by grams. Its price in 2012 was about $400 per troy ounce (or about $13,000 per kilogram), depending on the quantity and its supplier.
Brand names for oseltamivir include Tamiflu. Oseltamivir Prices. This oseltamivir price guide is based on using the Drugs.com discount card which is accepted at most U.S. pharmacies. The cost for oseltamivir oral capsule 30 mg is around $106 for a supply of 10 capsules, depending on the pharmacy you visit. Prices are for cash paying customers only and are not valid with insurance plans.