For 20 years, Screaming Meanie has been easily the most effective travel alarm timer on the market. No other alarm timer can awaken even the deepest sleepers as reliably as Screaming Meanie can. You will be shocked at the volume level of our alarm. Not even Sleeping Beauty could sleep through the extremely loud alarm noise. Housed inside a nearly indestructible case, powered only by a 9 volt battery, the Screaming Meanie cuts through even the loudest ambient noise. Others have attempted to copy us, but our unique technology can only be found in a genuine Screaming Meanie. When you absolutely must wake up on time, this is the best alarm timer on the market.