QOMO QRF900 User Manual - Manual (Page 90)

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Part 3. Hardware & System Installation
Illustration
3.1 Student Keypad
3.1.1 Specifications
Dimensions (L× W× H): 5 inches x 2 inches × 1 inch
Keys: 21
Power required: 2 AA Batteries
RF transmission distance: ~200 feet
Battery life: Depends upon use or up to 6 months
Function: Transmit response signals