This device is specially designed for 900MHz GSM mobile phone service. This mobile phone signal amplifier is very easy to install and operate. You don’t need to adjust the frequency of the device. Note: you can order a separate indoor antenna or outdoor antenna to strengthen the signal.
If you need the whole set(signal amplifier with indoor antenna or outdoor antenna), pls refer to this GSM 900MHZ Signal Amplifier - SKU: PL0658
Power Supply: INPUT: AC: 100V-240V OUTPUT: DC 12V-2A