The Mini Alarm That ROARS! Simple, Inexpensive, Effective and Discreet Mini Pull-Cord Alarm features a small design to help deter patient tampering. Magnetic pull-cord releases in any direction if pull-cord is separated from the mini alarm. Hidden on/off switch is located under magnet to help reduce patient tampering. Ideal for single-patient use to reduce threat of cross-contamination. Use this mini alarm with wheelchair or bed. Non-replaceable battery included. Specifications: 1-1/2"Wx3"Lx1-1/2"D ; Magnetic cord release ; Volume setting: 100-dB ; NiCad battery (included).