Options: Choose from two, four, or eight watering heads. Water Pump: Get an auto watering pump with timer. Material: Made with ABS plastic. Power: Uses a 3.5v rechargeable lithium battery - can go up to two months on a single charge! Function: Water plants automatically! Simply cut the necessary length of water pipe, set your timer, and install. Size: 9cm x 4.3cm x 3cm. Auto Watering Pump With Timer | Living Social