Hozelock Aqua Control 1+ water timer with dial and button programming, allowing the user to select the current time, watering start time, watering frequency and watering duration Programme acceptance is confirmed by an audible 'beep' Any element of the programme can be re-set without the need to totally re-programme the timer Read the instructions for further details Please note that the manufacturer states that the timer should only be operated using Alkaline batteries and rechargables should never be used. Product Code:HOZ2700