This figure-8 double-ring air-core Wireless Charger coil is a premium wide-sensing Rx coil (receiver coil) designed for Qi wireless charging consumer electronics. Constructed with two connected circular copper winding loops, this unique dual-ring structure drastically expands magnetic induction coverage, delivering stable charging performance even with large alignment offsets between the device and charging pad. The ultra-thin ferrite-free air-core design is widely applied in smartphones, TWS earbud cases, smartwatches and portable IoT gadgets supporting 5W/10W Qi wireless charging.