[ [无电流声+保真音质+立体声]特惠基础款 ]
[ [镀金插头+抗衰耐用+黑色]金属升级款 ]
[ [镀金插头+抗衰耐用+白色]金属升级款 ]
[ [镀金插头+HIFI保真音质+灰色]金属升级款 ]