BT789

◆14 Operation Keys：0~9 Digits Keys, "Start" Key, "Reset" Key, "BUZZER"Key, "BIBI" Key 

◆Choose (Buzzer, Vibration)Output

◆Loud sounder-beeps for 30 seconds 

◆Count down setting： 0 to 99 Min. 

◆Battery ： CR2032 x 1 

◆Dimensions：53 × 76 × 18mm 

◆Weight：46g