... from 80db to 90db, works on any of GSM, DCS, CDMA, PCS and WCDMA system; maintain safe and specific output signal ... handheld devices throughout a building can benefit from a wireless repeater, extended phone battery life.6)LED indicates power and working status ... , C33C-WCDMA C37C-GSM, C33C-CDMA, C33C-DCS, C33C-PCS, C33C-WCDMA GSM outdoor repeater/GSM Cell phone booster/CDMA PCS WCDMA DCS