216-217 MHz is a band of radio frequencies reserved for newer FM ALDs.

This band is relatively static-free and has little interference from other others.

The band allows ultra small receivers, and is used for tiny receivers that can boot on to the bottom of a BTE or even be completely built in a BTE.

The handheld mics are also relatively small and convenient and usually come with rechargeable batteries and multiple microphones with a selector that determines how much background noise they filter out.

These are excellent solutions for people who need to be able to hear at a distance or in noise.

Manufacturers currently designing equipment for this band include:

• Phonak
• Lexis
• Conversor

One manufacturer, Phonak, also has developed one of the most useful transmitters for 216-217 MHz ALDs. If you are currently using 216-217 MHz from any manufacturer, then you need to learn about the Phonak TelCom. The TelCom can be a wonderful help if you have a serious hearing loss and struggle with the TV and the phone.

While 216-217 MHz technology can support booted or embedded receivers and TelCom technology, there are other, cheaper FM technologies that can accomplish good quality audio communication at significantly lower prices.

• Many ALDs are still being built and sold using the 72-76 MHz band for transmitting the audio signal. These can also work quite well, but generally don't support the smaller format of the more expensive 216-217 MHz band.
• For those on a strict budget, some applications (like radio transmission of your TVs audio) to a small receiver driving a neckloop, silhouette, DAI or even headphones, you might look into 900 Mhz systems marketed to the general public. They are not meant specifically for hard of hearing use, but can work well in limited situations and are dramatically cheaper than the other options, often costing less than $100 for both transmitter and receiver.