Petzl Pro Adapt Mounting Plate One Size. The phone holder can also be used as a clip-on light. The phone holder can be removed and the battery replaced on the headlamp. The headband can be removed and snapped on the back of the headlamp. The compact size of the PRO ADAPT makes it a good light source for professionals. The phone holder can also be removed and the attachment for the lanyard can be attached on the top of the headlamp. The MOB function allows the user to reduce the power consumed by the headlamp by a third. Specifications for Petzl Pro Adapt Mounting Plate: Manufacturer: Petzl Weight: 48 g Size: One Size Features of Petzl Pro Adapt Mounting Plate Consists of two adhesive plates that resist impacts and moisture Allows the user to easily mount a DUO RL DUO S or DUO Z2 headlamp on a helmet: - allows the user to adjust headlamp tilt - compatible with Petzl helmets with or without eye shield For other helmets verify compatibility with the helmet manufacturer. Package Contents: Petzl Pro Adapt Mounting Plate Petzl E80004: Pro Adapt Mounting Plate One Size