There are several other pieces of hardware that are available to wirelessly communicate with the Chronos. There are two heart rate monitors from BM Wireless. The BM-CS5 is a high performance, long range version, up to 800 meters. On the other hand, the BM-CS5SR is intended for consumer use with distances of up to 10 meters. BM Innovations is also developing bike sensors to calculate speed and cadence. If a user would like to develop a custom application there are several options available. The AMB8423 which is similar to an eZ430-RF2500, except that it uses a CC1101 which is comparable to the CC430. The EM430F6137RF900 is a CC430 development board. Unlike the Chronos, it is a more traditional development board with a big whip antenna for advanced RF performance. In addition, it provides access to all pins on the device. The last two listed on this slide are both CC1100 class radios. They are both compatible with the Chronos. They are USB dongles, as shown here, very similar to the RF access point included with the Chronos. The biggest difference is that it has headers built into the development board for programming and I/O capabilities. There are many other development platforms that are compatible with the Chronos, typically the CC430 radios and any CC1100 class radio, like CC1101 or CC1111.