An electronic push retraction exit device for latching and unlatching a door, the exit device comprising: a support rail mountable to the door; a push rail mounted on the support rail and movable between an outward position and an inward position, the push rail being biased towards the outward position and movable to the inward position by manually pushing on an exterior surface of the push rail; a latch bolt operably connected to the push rail and movable between a latched position and an unlatched position, the push rail being connected to move the latch bolt to the unlatched position when the push rail is moved to the inward position; characterised by a linear actuator connected to move the push rail, the linear actuator having a driving state, an off state and a holding state, and being capable of controllably moving the push rail and holding at a constant linear position, wherein: the linear actuator moves the push rail towards the inward position when driven in the driving state, the linear actuator allows the push rail to return to the biased outward position when in the off state, and the linear actuator remains at a constant linear position and prevents the push rail from returning to the biased outward position when in the holding state; and a control circuit for controlling the linear actuator in the driving state and the holding state to move the push rail to the inward position and hold the push rail in the inward position, wherein the control circuit includes an actuator distance adjustment that allows adjustment of the distance the linear actuator moves and correspondingly controls the distance the push rail and the latch bolt are moved. a support rail mountable to the door; a push rail mounted on the support rail and movable between an outward position and an inward position, the push rail being biased towards the outward position and movable to the inward position by manually pushing on an exterior surface of the push rail; a latch bolt operably connected to the push rail and movable between a latched position and an unlatched position, the push rail being connected to move the latch bolt to the unlatched position when the push rail is moved to the inward position; characterised by a linear actuator connected to move the push rail, the linear actuator having a driving state, an off state and a holding state, and being capable of controllably moving the push rail and holding at a constant linear position, wherein: the linear actuator moves the push rail towards the inward position when driven in the driving state, the linear actuator allows the push rail to return to the biased outward position when in the off state, and the linear actuator remains at a constant linear position and prevents the push rail from returning to the biased outward position when in the holding state; and the linear actuator moves the push rail towards the inward position when driven in the driving state, the linear actuator allows the push rail to return to the biased outward position when in the off state, and the linear actuator remains at a constant linear position and prevents the push rail from returning to the biased outward position when in the holding state; and a control circuit for controlling the linear actuator in the driving state and the holding state to move the push rail to the inward position and hold the push rail in the inward position, wherein the control circuit includes an actuator distance adjustment that allows adjustment of the distance the linear actuator moves and correspondingly controls the distance the push rail and the latch bolt are moved.