... /CTN 20pcsG/W 21.3KGProduct introductionMini card voice box, with small pocket size and wonderful sound quality which is even more ... , holds 350-800 milliampere lithium electricity. Its volume is quite small, so it is easy to be taken along with you ... device.Product featuresAs the MP3 public speaker, the product is small size, convenient to carry, with noble bake lacquer appearance and ...