1. Material: ABS
2. Sound output (max): 129+/- 5dB
3. Sound gain (max): 55dB+/-5dB
4. Frequency range: 450~3500 hz
5. Battery: 1 AA batteries (batteries not included)
6. Operating voltage: DC1.5V
7. Product size: 6.6 x 4.3 x 1.6cm
8. Net weight: 29g

Package includes
1 x hearing aid
4 x ear plugs (different sizes)
1 x User Manual
1 x Box