Answer:
The SEWACall KW4H transmitter measures 85 x 85 x 10 mm and operates at a 433.92 MHz wireless frequency utilizing AM modulation. It has an open-air transmission range of up to 100 meters, operates on DC 12V using a 23A 12V battery (they are not included), draws a 10 mA working current, and outputs 2.58 to 3.69 mW effective radiated power.
The SEWACall KW4H wireless call unit is engineered with the following electrical and RF specifications:
- Dimensions: 85 mm x 85 mm x 10 mm
- Transmission Frequency: 433.92 MHz
- Modulation Type: Amplitude Modulation (AM)
- Operating Voltage: DC 12V
- Working Current: 10 mA
- Radiated Power (ERP): 2.58 mW to 3.69 mW
- Transmission Distance: Up to 100 meters in open-air conditions
- Power Source: 23A 12V battery (they are not included)
