You might sleep through it

• Rooster alternative?
• 1819 reveille summons
• Sony Dream Machine, e.g
• Night-table device
• It'll wake me up like loud music around 11:50, which is totally pointless
• Device originally powered by water
• Device with a snooze button
• It often rings in the morning
• It gets you going on time

Wiktionary Word definitions in Wiktionary
n. (misspelling of alarm clock English)