If the earmuffs are not fully inserted into the ear canal, or if the air leaks out of the earmuffs, it will cause an annoying whistling sound. -Specially designed for hearing-impaired people, more suitable for the ear canal.
eBay
6-60PCS Hearing Aid Batteries RAYOVAC PEAK 1.45V 312 312A A312 PR41 Zinc Air Battery For BTE CIC RIC
Aliexpress UK
eBay
6-60PCS Hearing Aid Batteries RAYOVAC PEAK 1.45V 312 312A A312 PR41 Zinc Air Battery For BTE CIC RIC
Aliexpress UK
🎧 Digital Noise Reduction – High-quality digital chip reduces background noise and enhances speech clarity. Includes USB charging cable. Multiple Ear Tip Sizes.
eBay
We give 4 different sizes of earplugs to reduce howling and noise. Peak Gain(dB): 35dB, suitable for mild to moderate hearing loss (Reference hearing loss chart). Insert the hearing aid into the ear canal, adjust its position in the ear canal until the soft earplug is fully deployed and fill the ear canal.
eBay
eBay
Description:Fashion Shape: The device was designed by the most experienced engineers, it's exquisite, small and portable. It even looks like a Bluetooth earphone, it could be worn comfortably. Its shape can fit perfectly in your ear. The big, middle and small earplugs was provided in the package, can adapt to people with different ear canal.Easy Operation: Only one button needs to operation: Long press turn on when device is off; long press to turn off when device is on; Short press add volume when device is on, so easy. No need to replace the battery, you just pull in the standard Mini USB to recharge like mobile when you are not using it. The device will be shut down when you pull it in the box.Noise Cancelling & Great Sound Quality: The device use.
eBay
Features:-It adopts a lightweight in-ear design and comes with earplugs of different sizes to ensure a tight fit, comfortable wearing and reduced howling.-The left ear is blue and the right ear is red, making it easy to tell which ear it applies to. With obvious on/off button for easy operation.-Hidden design, looks like a Bluetooth headset, so you won't feel uncomfortable.-Equipped with a 300mAh large-capacity charging box, it can be fully charged in about 30 minutes and can be used for about 6 hours. The charging box can provide 5 charges when fully charged.-Built-in intelligent digital chip, intelligent noise reduction, no fear of noisy environment, providing excellent sound quality.Specification:Maximum sound output: 118+/- 3dBSound gain: >= 35dB+.
eBay
Digital Mini Hearing Aids Invisible In Ear Small Sound Voice Amplifier Enhancer. Type Hearing Amplifier. Hearing Aid Fitting In the Ear (ITE). The device can be easily turned on/off with the power switch.
eBay