About Product:Brand: neutral transmission range: 15 m function: support music processing custom: is printed LOGO: can be bluetooth protocol: 4.1 track: stereo way of use: whether earplugs type single and double ears: bilateral stereo applicable gift-giving occasions: advertising promotion, business gifts, awards, fairs, the anniversary celebration color: brave warrior brown, clever and blue, rosy downstream of the main platforms: speed sell tong, amazon, wish, ebay, independent station main sales regions: Europe, North America, South America, southeast Asia, the Middle East have may authorize its own brand: whether cross-border supply of goods: is support for custom: support