Personal Tactile Receiver Notification to the deaf/blind through unique vibrating patterns and a tactile pad. Pager type Vibrating Receiver for portability around the home. Belt worn for vibrating notification of all Alertmaster functions plus paging from the AM-6000 inside or outside your home. Operating distance up to 80 feet. Uses 9V NiCad battery and chargeer included. 8 hours minimum for full charge, 16 hours maximum life. Weight 6 ounces, size 2.75" x 4.1" x 1.4". One year warranty.