SureWave 2nd generation hands-free switches that provide superior door activation in new and retrofit access control and automatic door applications. CM-333 and CM-336 battery powered models are supplied with (2) AA alkaline batteries. Lithium batteries recommended for environments below 0°C (32°F). CM-324 Series (original) single relay wired hands-free switches features an operating range of 1-30", adjustable time delay of 1-5 seconds and provides superior performance in all ambient lighting conditions. CM-325 Series hands-free switches are specifically designed for use in healthcare and facilities where highly reflective surfaces (chrome or polished stainless steel) cause standard touchless switches to false activate. Add 'F' to graphic option for French language. Camden has introduced a new 6" surface mount round mounting box as well as a complete range of conversion kits for mounting SureWave switches on existing square and round push plate switch boxes.