2019 Upgraded, Anker Soundcore Liberty Neo True Wireless Earbuds, Pumping Bass, Color:Black True Wireless Earbuds for True Musical Freedom Liberty Neo true wireless earbuds are the embodiment of musical freedom. They boast our pioneering graphene-enhanced drivers that deliver a wider soundstage, intensified bass, exceptional accuracy, and crystal-clear clarity. The earbuds ultra-secure fit keeps them securely in place during your commute, while navigating city streets, or even when working up a sweat. And when you need to recharge, the mini charging case gives Liberty Neo a boost without being constrained by a power outlet and wires. Key Features Expertly Tuned Sound: Graphene drivers produce a wider sound stage with exceptional accuracy and clarity. BassUp technology increases bass by up to 43%. Lightweight and Secure: Proprietary GripFit technology keeps your earbuds securely in position, while the ultra-lightweight 0.2 oz build ensures theyll never weigh you down. IPX7 Waterproof: Exclusive SweatGuard protection creates a watertight barrier for your wireless earbuds against rain and sweat. Unbreakable Connectivity: An external antenna and Bluetooth 5.0 work together to create an almost unbreakable link between your wireless earbuds and device. Built-In Microphone: For clear, hands-free calls. Key Specifications Audio Sensitivity: 97db SPL Frequency: 20Hz-20kHz THD+N: