Control the excessive use of wireless networks by children , prevent interference with neighbor networks, and effectively solve the addictive habit of staying up at night and playing games; it can be turned on and used for all wif signals, and can pass through walls; it does not affect mobile phone signals and traffic. Tips:The product may be updated constantly, The Actual Product May Have Slight Differences Or Color Differences the color and appearance may be changed, please don't mind. And take a consideration before place the order if you have request for color or appearance. Battery capacity:6800mAh, standby time is about 2 hours Product battery life:supports 220V AC power while charging and using Product features:2.4G+5.2G+5.8Gwif+Bluetooth+hotspot for all wif signals Coverage range:about 10-20 meters, does not affect mobile phone signals Suitable people:families, conference rooms, offices, etc. Plug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on. Voltage:AC220V Colour:Black Material:ABS Package Contents: 1 * Signal detector Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.