Uniden GMR635-2CK 22-Channel 6-Mile GMRS/FRS 2-Way Radios with Charging Cradle (Pair) Review

My house and school are located in each hill-side of a lake. So, I should go down and then up to go to school. I tried two different situations.

(1) The road is covered by trees: It works just around 1 mile range. After that, I lost signal.

(2) Between my home and school: Both of us went to outside and I stand where I am able to look at the school. My friend was on
the roof on fifth-story building. It worked about 5.5 miles range. We measured a direct distance on the map.

Uniden claim 6 miles and it doesn't seem to be a lie. But, 6 miles can only happen in the extremely-friendly condition.

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Product Description:
Stay connected with your buddies while hiking on the trail, riding the ski lift, or exploring other locations within a 6-mile range with this pair of GMR635 two-way radios. Also ideal as a neighborhood watch tool and workplace aid, each radio features 22 channels (15 GMRS and 7 FRS) for communicating with friends or family. It's easy to browse for channels thanks to the channel scan feature, which looks for active signals while you view the display, and the monitor function, which listens for weak signals on a given frequency. And talking on the radio couldn't be simpler--just hit the PTT button when you're ready to transmit. It's important to note that the transmission range will vary depending on the channel and the surrounding terrain.
Additional features include a backlit LCD display with a battery strength meter, a keypad lock that keeps you from accidentally pressing buttons at the wrong time (such as when a radio is in your pocket), a roger beep that indicates the end of a transmission, and your choice of five different call tones. The radios come with a single charging cradle that can accommodate both radios at once, two NiMH rechargeable battery packs, and two belt clips for efficient transport. The entire bundle is backed by a one-year warranty on parts and labor.
What's in the Box
Two GMR635 two-way radios, dual charging cradle with AC adapter, two rechargeable NiMH batteries, two belt clips, user's manual.
Note: Use of the General Mobile Radio Service (GMRS) frequencies requires a Federal Communication Commission license. For information and application forms, visit the FCC at www.fcc.gov/wtb/uls or call the FCC hotline at 1-800-418-3676. For further questions, contact the FCC directly at 1-888-225-5322.

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