Electric pumps (purchased)
Come in single and double options. Some plug in and some have rechargeable batteries. Variety of options and features depending on brand and price point. Can be used for frequent pumping.
Pros: Better for scenarios where baby is not latching well and you want to establish a good milk supply, can be made hands free with a pumping bra, more variety of suction patterns than a manual pump.
Cons: high price, difficulty to compare models when purchasing, some people respond better to some pumps than others, cannot be shared between users.