CHUXAWAY SCXNo more getting up at the crack of dawn to let the chickens out! uses just 3 x AA integral alkaline batteriesNo mains power is requiredFULLY PROGRAMMABLE 7 DAY TIMER – You decide when it opens/closesMANUAL OVERRIDE – You can open and close at the push of a buttonTIMER and MOTOR units can be located in different positions for convenienceMOTOR UNIT can be accommodated within limited vertical space (90mm above top of open door) The Chuxaway SCX is easy to install and requires just 3 x AA alkaline batteries, (installed within the Timer Control Unit). All sensor functionality is contained within the Chuxaway SCX motor unit. The unit requires no calibration. Installation is simple, and electrical connections are limited to connecting two wires to connect the Motor unit to the Timer Control Unit, (using screw terminals). All mounting screws and cable clips provided, and 2 spare cords are also provided. The Chuxaway SCX utilises an Integral Timer so that you are in control of when the door opens and closes. In our opinion this control is more desirable than light sensing models - essential for those weekend lie-ins and perhaps as a courtesy to neighbours! The timer enables up to 6 programmed door open and door close sequences using a 7 day timer, though it is anticipated that most people will choose a single programme to open at a particular time in the morning and close at a set time in the evening. These times are fully configurable by the user to within 1 minute. It is possible to have the door open/close at different times on different days of the week if you want to. It is very easy to change the times as the daylight hours change through the season; (a process that takes just a few seconds). The unit features a Manual Override so that you can open and close the door on the control unit by pushing a button; (this is an extra cost option with some other kits). The design ensures longevity of battery life – e.g. over a year, though this will depend upon the quality of batteries, weight of the door, the number of open/close operations, and climate. The unit will lift a door weight of up to 1.5lbs (circa 750g), but we recommend our lighter Aluminium Door Conversion option which weighs circa 0.5lbs/250g, (see other listings and website). Please note, no door is provided with this listing - please see alternate listing for door inclusive solution. The design utilises a motorised lift and gravity close approach. This is a DIY installation. The kit includes full step-by-step instructions (in English), and all fixings. Only basic DIY equipment such as screwdrivers are required). Works with vertical slide opening and closing doors including Ark styles. Note that the Chuxaway SCX motor unit needs to be mounted such that the rising door makes contact with the sensor integrated on the underside of the motor unit when fully open. (90mm space required above door to accommodate the motor unit). The installer may need to modify the existing door if it does not open/close vertically, or alternatively see our listing with Door Conversion Kit. The motor is contained within a weatherproof case, and can be mounted remote from the control unit. The control unit should be mounted under-cover, (i.e. protected from the rain). If your chicken run does not have a roof, then you should afford consideration to a weather-proof cover or enclosure, or if you have good access you could mount the control unit inside the chicken house itself. Customer satisfaction is of the highest importance to us, as we are aware that our reputation will depend upon the same, (please see our feedback). To that end we will guarantee the components for 12 months and provide a full after-sales service by way of e-mail support. If you are anything less than fully satisfied with the kit, then please let us know first and give us the opportunity to rectify as we seek to maintain the highest satisfaction level. Please also see also our Returns Policy, as we are keen to ensure full satisfaction and will accept returns within 14 days of receipt of goods, provided goods are returned in a re-saleable condition.Thank you for your interest.