need 50-12 feeder points to buy at the link below:
https://item.taobao.com/item.htm?spm=686.1000925.0.0.0TFCI8&id=523734595989
Major brands such as Sanwei, Wuyou, Post, Guoren, Jingxin, Xinmin and so on. The ceiling antenna is an engineering antenna, not an amplifier, but an antenna used by the device. If you don''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''t know the purpose, please do not consult the purpose. Thank you, this is not the purpose you imagine.
There is no falsity to take pictures of real objects. Super coverage and strong penetrating power. Gain 5DB, with quality certification from the Ministry of Communications Industry. . Support multiple channels such as GSM and CDMA.
This product is used inGSM/CDMA/PCS/3G/WLAN, 806 ~ 2500MHz frequency band, indoor coverage.
Features: Broadband, low standing wave Small size, beautiful appearance, common ceiling installation
Related indicators:
Frequency (MHz) 800~2500Dual frequency
Gain (dBi) 5
Polarization mode vertical
Standing wave ratio ≤1.5
Input impedance (Ω) 50
Maximum power (W) 50
Lightning protection DC grounding
Connector model N-F
Antenna size (mm) 45*ø190
Antenna weight (kg) 0.25
Radiation vibrator material copper
Reflector material Electrolysis plate
Radome material Anti-UV ABS
Operating temperature(°C) -40~60