Wireless Digital Hearing Aid with Bluetooth APP iPhone Android Cell Phone Control for The Deaf Ear. Cell phone App Control: Programmable via Android and iOS apps with volume, mode, and frequency adjustments. Rechargeable Battery: Built-in rechargeable battery provides up to 20 hours of working time. 16-Channel Digital Processing: Advanced 16-channel WDR chipset for precise sound shaping and noise reduction. OEM Customization Available: Customized color boxes and logo printing on hearing aid body are supported. 1-Year Warranty Coverage: Free repair service for quality issues within one year of receipt. Multiple Hearing Aid Styles: Available in RIC, ITE, BTE, ITC, and CIC styles for various hearing loss levels. Safe Maximum Output: Maximum output limited at 115dB to protect ears from sudden loud sounds. Fast Delivery Options: Delivery within 3-7 days after payment for samples and small orders.