I see on the??link it has the following under "List of Features" i.e. 13V
- 5W output at 9V supply (can be built for 4-5W at 12-13V supply)
- Receive current 100mA, Transmit current 1.0-1.1A for 5W output with 9V supply (around 0.7A for 5W with 13V supply)
