4-channel type can efficiently provide shield for mobile signals from CDMA, GSM, DCS and PHS

It only shields the signals from mobile phone but also does not affect the normal operation of other electronic devices

Use mobile phone at the places more than 200 meters away from the base station

Switching on, it can work stay for a long time

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

Frequency:

CDMA: 870 to 880MHz

GSM: 930 to 960MHz

DCS: 1805 to 1880MHz

PHS: 1900 to 1990MHz

3G TD-SCDMA : 2010 to 2025MHz

3G WCDMACDMA200: 2110 to 2170MHz

GPS: 1500 to 1600MHz

Wi-Fi: 2400 to 2500MHz

Suitable for business meeting room, museum, gallery, theatre, concert hall, church, temple, restaurant, classroom, training center, factory, bank, train and bus

Ideal for using in the locations of special purpose