The key features

Dual working modes: Hearing aid mode andBluetooth mode are available for selectionMaximum output limit functionAutomatic gain controlAdaptive feedback suppressionIntelligent wind noise suppressionIntelligent environmental noise reductionErgonomically designedThe startup delay is adjustable

The volume of the prompt tone is adjustable

Specification：

Bluetooth version: BT5.3Frequency range:200Hz~8KHzSpeaker(SPL):100db+3dbAverage gain: 36db+2dbTotal Harmonic Distortion: ≤ 1%Bluetooth distance: >10mBattery: 200mAhUse time: 13H

Charging time: 2HWaterproof grade: IPX5