alert automatically shuts off after 29 minutes. The lamp can be used for both flashing and reading. Features: battery back-up - 9 volt battery (not included), snooze button, green digital display with adjustable angle for easy reading. Adjustable buzzer to 113db. Volume and tone adjustments. Built-in deluxe remote receiver ($44.95 value free). If vibrator needs to be replaced at a future time must order white female vibrator item#12005.Works with any Sonic Alert transmitters. 5 yr. manufacturer warranty. Product dimensions (imperial): 3.5 inch H x 5.5 inch L x 5 inch W Product dimensions (metric): 88.90 mm H x 139.70 mm L x 127.00 mm W Package dimensions (imperial): 4.75 inch H x 8.75 inch L x 6 inch W Package dimensions (metric): 120.65 mm H x ...  (less)