... star: (4) Average Customer Review (8 customer reviews) Share your thoughts with other customers: Most Helpful Customer Reviews 3 of 3 people found the following review helpful: Terrible product, December 26, 2007 By R. Stringham - See all my reviews Effective range on the 81.3 MHz channel was about 2-3 ft, and on the 85.3 MHz channel the range was around 8 i nches. Granted, I live in New ...