MEDELA IS THE BEST. U CAN BUY IT IN MANNINGS. IT HAS SINGLE/DOUBLE ELECTRIC/MANUAL PUMP.
DOUBLE ELECTRIC IS THE BEST. IT CAN STIMULATE THE MILK LEVEL TO INCREASE. I TRIED IT AND IT SAVES MUCH TIME AS IT PUMP MILK FROM BOTH BREASTS AT THE SAME TIME BUT IT WOULD BE A BIT MORE EXPENSIVE. AROUND HK$1,2XX. TRY!