Note: This item come with US plug adapter. Please confirm the voltage information of your area before order.DescriptionThis practical tool can amplify the signal, then the amplified signal is sent to the indoor antenna, the indoor antenna can transmit the signal into your house, so you can enjoy clearer phone call or faster mobile date inside your house. It is also can extend the battery life of mobile phone. An necessary tool that you need.Features- Practical and easy to use. Applicable to family, office space, hotels, large buildings bottom and other indoor places. - Small size, eco-friendly, low operating temperature. - Included an indoor antenna and outdoor antenna, let you use it more easily and freely. - Effectively reduce mobile phone radiation on the human body. - Extend mobile phone battery time and life. - Warm Tip: Dear buyer, Due to lighting effect, monitor's brightness, manual measurement and etc, there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand! Thank you!Specification- Color: Blue. - Material: Metal+Electronic Component. - Size: About 14.1 x 8.4 x 2.4cm. - Frequency range: 890-915MHz (Up Link);935-960MHz (Down Link) - Coverage range: 100sqm (depends on outside signal and using different cable)- VSWR: less than 1.5 (V.S.W.R) - Gain: Uplink: 55dB ;Downlink: 60dB - Power: 15dBm - Impedance: 50 ohm - Noise figure ( MAX. gain ): less than 4.0dB - Connector: F female - Compact design: Indoor use- Ambient temperature: -25C~55C - Relative humidity: 85%