Wireless Extender zBoost YX230 Dual Band 800 and 1900 ...

• Reduces dropped calls and dead zones - Works with multiple phones simultaneously.
• Extends cell phone range - up to 10 times the signal strength - Extends cell phone battery life.
• Improves signal strength for voice and data - AMPS CDMA GSM TDMA (except Nextel / iDen).
• Phone stays wireless - no direct wire to phone.
• 1 year warranty from Wireless Extender

disappointing!:
The antenna is undersized and does a poor job of capturing signal, it could easily be much larger. I'm a man and I want a big antenna. What they don't tell you; the indoor antenna has to be within an 8 inch proximity of your cell phone, thanks for the RF boost around my head. I would recommend directly plugging into the cellular to reduce RF radiation,(part not included.) Meanwhile to reduce my exposure I only power up while in marginal signal area's. This product is not a magic bullet, it's important to note; if there's ZERO SIGNAL capture by the undesized antenna out side your vehicle, then you will be amplifying ZERO SIGNAL, to address this I am now purchasing a 'high gain' truckers antenna. Oh yea it's big. So YES this product does work, but there is a serious lack of clear details on the web site from the seller, they need to step up to the plate and disclose more info, ESPECIALLY about the small indoor signal footprint.