ขาย Band20/1/3/8 Four-Band Booster 800/900/1800/2100Mhz เครื่องขยายเสียงโทรศัพท์มือถือ 2G 3G 4G เซลลูลาร์ LTE GSM UMTS DCS 0 ราคาที่ดีที่สุด

Important Note ( please read , and please read all descriptions carefully ) Make sure you can receive good signal that you want to amplify on your house outside,which must be can getting 3~5 bar signal (-70dB~-90dB signal strength) on your mobile phone. Please note that the signal booster can only boost the mobile phone network signal, but does not help to generate any signal. For example, if your outside signal has 0 bar, it can not work or bring you any signal.. Below is the method to check the mobile phone signal strength. Turn on the network (2G/3G/4G) you want to amplify and go to outdoors of your house: A: Install an app: Network cell info Lite, and show the screenshot to us. B: If you use iPhone .Holding the phone to the outside.Dial: *3001#12345#* → click into :Serving Cell info Feature: -cover: 200-500 square meters without obstacles -improve GSM900 DCS1800 WCDMA 2100 and LTE 800 at the same time -With LCD Display , can indicate the signal status. -if can meet800 900 1800 2100 frequency band , it can support different oprators. -easy to install. This signal amplifier kit includes everything you need. -Improve Indoor mobile signal,no more dropping calls,no more bad network speed. Specification: -Power: -70 ~ -40 dbm / FA (1.23mhz) -Max. Output Power: 20dbm + 3dbm Total Power -Frequency Range(LTE800):UL:832~862MHz;DL:791~821MHz Frequency Range(GSM900): UL:890~915mhz;DL:935~960mhz; Frequency Range(DCS1800): UL:1710~1785mhz;DL:1805~1880mhz; Frequency Range(WCDMA 2100): UL:1920~1980mhz;DL:2110~2170mhz; -Connector Type: N Female Connector tor packaging: -Signal Booster -outdoor signal antenna -indoor signal antenna(with 3M cable) 4.15m or 10m 20m 25m 30m 50Omega Cable -English manual installation steps: -Fix the reception of the roof outdoor antenna or the high place and the turn signal point. -Connect the external antenna to repeater machine '' BTS '' port via cable. -Connect indoor antenna to repeater '' MOBILE '' port. -AC plug power cord into the power source and finished. -TIP: An outdoor antenna should be "isolated" from the internal antenna, that is, it must be constructive obstacles (walls, partitions, etc.) between the antennas. Note:when outdoor antenna and indoor antenna are separated not enough, then it will be self-oscillation. your phone will not get any signal.