Synthetic limbs are able to mimic the look of the original human limb. They require charging overnight for use during the day.[1]
Detective John Kennex was fitted with a synthetic leg after his leg was blown off during a botched raid.[2] He has no feeling in the synthetic limb[3] and requires calibration in order for the leg to work correctly.[4]
In "Arrhythmia", John was pressured into donating to a synthetic limb fund for children whose families can't afford the technology.