This thin circular air-core Wireless Charger coil is a standard lightweight Rx coil (receiver coil) designed for low-power Qi wireless charging consumer electronics. Wound with high-purity enameled copper wire into a flat circular open-air structure, this coil delivers stable magnetic coupling and low power loss. Without ferrite shielding, it achieves ultra-thin lightweight design, perfectly fitting TWS earbud cases, smart watches, mini portable gadgets and slim wearable devices that support 5W/10W Qi wireless charging. The straight extended leads enable fast soldering to PCB boards for mass production assembly.