Let the hive mind of Engadget get that for you.
"I own an iPhone 3G and I'm looking for a decent speaker / alarm clock for it. I am going to listen music in a mid-sized room, so I want nice quality speakers with solid bass. I also want to use it as an alarm clock, so it would be great if there is such a feature. The price can be low-mid to mid-high range. I was looking at the Klipsch iGroove SXT; it's powerful, slick and the reviews are good, but it doesn't have an alarm clock feature. It's no deal breaker if I can set it up from the iPhone, but I'm not sure. Thanks!"
1. RF contact-less detection
2. Portable operation
3. Detection range: 1m ~ 5m, adjustable
4. Cell-phone in transmission working mode / receiving standby mode / power-off mode can be effectively detected
5. Suitable for all restrict area of prohibited cell-phone usage
6. Finish prototype fabrication & performance evaluation