GSM outdoor bi-directional signal amplifier

This device adopts GSM outdoor bi-directional signal amplifier for improving communicatingquality and decreasing noise. It can be used in hotels, office building,tunnels, viaducts, basement markets, parking lots, elevator rooms, etc. It canensure the perfect communicating performance for the GSM mobile phone.1.Meets the standard of GB6993-862.The compatibility of electromagnetism meets the standard of ETS 300 609-43.Waterproofing and antirusting metal shell, beautiful and practical design