Features:
1. Max sound output:125±3dB
2. Sound gain: ≥26±3dB
3. Total harmonic wave distortion: ≤3%
4. Frequency range:300-4500MHz
5. Input Noise: ≤26dB
6. Voltage: d.c.1.5V
7. Current: ≤2mA
8. Digital System & Support Bluetooth Function
9. Charging box:
Include 300mAH
Full charging about 2 hours
OK to hearing Amplifiers recharing about 3 times
10. Hearing Amplifiers:
Include 48mAH
Full charging about 2 hours
Normal working more than 20 hours, and Bluetooth about 6~8 hours

Packaging list:
1 Pair Hosts
1 x Charging compartment
6 x Earplugs
1 x Type-C charging cable
1 x English instruction manual