1. 5-channel type can efficiently provide shield for mobile signals from CDMA, GSM, DCS , PHS;3G

2. Coverage is with radius 5M-15M (different mobile and different signals have different influence

3. Generally, please use your mobile phone at the places more than 200 meters away from the base station;

4. Switching on, it can work stably for a long time;

5. Slow start-up circuit can avoid sparkling caused by mechanical switch.