Directivity Pattern
Beamwidth of directivity pattern: approximately 90° (-6 dB)
Free-field AI-DI: 8 dB (std dev 0.2dB)
Average AI-DI measured on KEMAR®: 7dB

Transmission
Wireless by induction
Switch set to BTE: 2-10 A/m for typical BTE hearing aid telecoil positions
Switch set to ITE: 2-4 A/m for typical hearing aid telecoil positions at 1.2" (vertical telecoil orientation required)
VC: 20 dB variation of fieldstrength

Microphone Noise
30 dB SPL equivalent (A-weighted)

Battery
#10 hearing aid battery
Current drain: 0.4 mA
Battery life: approximately one month (based on estimated daily use of 4 hours)

Details
How does it work?