GM-301 Hearing Aid Rechargeable Sound Amplifier,Spec: Without Bluetooth Black

1. High-performance noise reduction chip, multi-scene noise reduction processing, high-definition fidelity sound quality2. Bendable ear wire, ear wire can be adjusted to fit the ear according to different ear shape3. Using directional transmission, low latency and low lag, in-person chat, telephone communication can achieve natural and smooth communication4. 360-degree rotating silicone ear hooks, regardless of the left and right ear, long wear without pain5. Built-in 45 mA lithium battery, continuous use time up to 30 hours6. Support cell phone BT connection, hands-free calls, high-definition noise reduction (only BT models)7. Double key minimalist operation, designed for the elderlyParameters:1. Host battery capacity: 45 mA2. Battery capacity of charging compartment: 400 mAh3. Saturation sound pressure level (MAX): less than or equal to 129 +/- 3dB4. Output sound pressure level (average value of high frequency): 120+/-4dB5. Full-range sound gain (high-frequency average): 38+/-5dB6.Frequency response range: not narrower than 500Hz ~4500Hz7.Monaural hearing aid weight: 5.6g8.Size: 4.6 x 3.6cm