* 260 hours for continuous use, Ultra-light body with low power consumption
* Streamline pocket carry box with auto-shut-off function when the unit is put back
*Ultra-smal body with digital function
* 1 x cleaning brush is included
- deft miniature hearing aid with low distortion, noise.
- volume can be adjusted to all condition
- battery: 2 x pr41 (button size)
- to prevent from children swallowing, battery cover should be torn down with tool.
- Total Harmonic distortion valuse of easily:
2500Hz: below 3% / 800Hz: below 4% / 500Hz: below 4% .
- standard frequency: 2500hz
- out volume: 25-35db
- sound pressure level: 104-113db (below 117 db)
- input interference level: below 29db
- battery current: below 0. 8ma
- battery life: 260 hours (11days)
