... Signals Booster for small signal weak & block zones Working system GSMModelST-970Frequency rangeuplink:890-915MHzGain Up link: Gp≥67dBDownlink: ... to the base station , after the opening the original system and the base station without the need to adjust ... not in the lift cables laid E,Home ,office ,luxury yachts ,private cars ,public security system and road safety management ,etc. wholesale ...