A circuit board connector comprises a housing, at least one signal contact disposed in the housing, and a pair of locking arms attached to the housing. The housing has a slot formed therein, for receiving a circuit board. Each locking arm has a latch movably disposed in the slot. The pair of locking arms are resiliently deformable relative to the housing between a lock position at which the latch is positioned to block the slot, to lock a circuit board to the connect, and an unlock position at which the latch is positioned to form a clearance in the slot, to allow disconnection of the circuit board from the connector.