Product Features1. Lazy alarm function: 1 - 5 five sets of alarms can be set arbitrarily, each ringtone for 60 seconds; This function, in addition to being suitable for the general alarm clock user, is particularly suitable for the lazy, can set five consecutive one-minute reminders; Countdown function: maximum countdown of 23 hours and 59 minutes ( some batches are 99 minutes and 59 seconds); There is 60 seconds ringtone after the countdown, there is a memory function, when the countdown is over, it will automatically the set countdown time; Press any key in the alarm buzzer, BB sound stops, automatically to the set countdown time, press "M / s" key for the next countdown, easy to use, this function is particularly suitable for telecommunications, banking, catering and other industries requiring limited time services.3. Set five series time interval and countdown time at will;4. Five sets of sounds have 60 seconds of noise;5. Clock time system: 12 / 24 hours can be converted; Key function1. Set (mode): set key, press and hold for several seconds to start setting;2. H/M: set the hour value (countdown is in dots); M/S: set the minute value (seconds for countdown) and start or stop alarm or countdown .Instructions for useWith the product comes with detailed instructions for use (manufacturers of the same series of products are many, some parts of the instructions may refer to other model content, depending on the physical object), here omitted.Gender products1. Use AAA battery (Timer does not contain batteries)2. Window size (LCD): 50mm 28mm Outer dimension: 80mm56mm22mm3. Weight: 62 grams / PC4. Sound noise: DDD sound, sound size is suitable for the vast majority of people to use, especially sleepy people may not wake up, please buy with caution! This store does not accept s and exchanges due to sound size issues!