I purchased a UV5R on Xianyu that claimed to be 8W, but the packaging, battery, and charging cradle had no markings. The label indicated 8W, and the seller gave me a 5W sticker to put on it so I could test it. This "8W" device only has H and L power modes, and when transmitting with a Xiaomi 2S, there is a significant buzzing sound. Another UV5RX and UV5RH PRO in six bands also didn't produce any buzzing sounds when transmitting with the Xiaomi. Please help me figure out if this 8W device is a fake version of Baofeng.