This type of timer will not work for the pool pump/lights. This type is for plugging a lamp into via a socket in the wall. The timers for the pool pump etc have to be hard wired into the circuitry.
To quote from this site;
This timer is ideal for switching lights, radios, etc. on whilst your house is unoccupied, giving the impression that people are in. By programming certain appliances to automatically switch on at night, this unit can also be used to take advantage of cheaper electricity at these times. The timer can be programmed to turn appliances on and off as needed, thus reducing the need to leave appliances on standby.
This timer is suitable for any appliance with BS plug and maximum load not exceeding 10A/2300W (resistive).