Da4000Mr-30U Backbox Lg
We get a lot of questions about cell phone repeaters and this is one that might be interesting to check out (and take apart)…

  • DA4000MR Wireless – no connections to cell phone
  • Increases cell phone range up to 50+ miles
  • Amplifies 800 and 1900 MHz bands
  • Use multiple cell phones and carriers at the same time
  • Reduces dropped calls
  • Up to 1,000 sq. ft. coverage area or one room
  • Extends the life of your cell phone battery

DA4000MR can be used with all 800 & 1900 MHz digital cell phones & tri-mode phones operating on CDMA, TDMA, PCS, GSM850/1900, GPRS and AMPS.

More here – [via] – Link.