Advanced Bluetooth Technology: Equipped with the latest Bluetooth 5.3 version, the M20T earplugs offer seamless connectivity, ensuring clear and uninterrupted communication in noisy environments. Superior Noise Cancellation: Experience state-of-the-art interference cancellation technology that blocks out harmful noise while enhancing important sounds, perfect for maintaining situational awareness and communication in industrial settings. Enhanced Hearing Protection: Protect your hearing effectively with these electronic devices designed to filter out high-decibel sounds, making them ideal for construction sites, and manufacturing plants. Battery capacity: 500mA Function: Noise reduction+sound pickup+Bluetooth communication There is a transparent mode, which works in both pickup noise reduction and Bluetooth dual-mode simultaneously Fast Wave Compression: A fast response algorithm that compresses sound within 0.5ms at -speed. Multi scene switching: 1. Outdoor mode: maximum sound and maximum distance 2. Indoor mode: normal hearing and segment distance 3. Silent mode: Listen to Bluetooth audio or make phone calls Rechargeable, 8-hour high battery life Charging, automatic shutdown after two hours of inactivity Due to different batches, there may be differences in product printed text, which will not affect use. Colour:Black Material:ABS Package Contents: 1 * Electronic Earplugs kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.