A device holder includes a body having a receiving port and an arm having an engagement member. The engagement member has a plurality of teeth and is pivotally aligned with the receiving port. The device includes a button extending through a surface of the body pivotally coupled with a pawl positioned to releasably engage the teeth of the engagement member. A biasing member is located between an inner wall of the body and the pawl, biasing the pawl away from the inner wall. A lock located in the body and an actuator extending through a surface of the body is also included. The lock is positionable between a locked and an unlocked position.