About Product:Brand: neutral transmission range: 10 meters function: voice control 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, opening ceremony color: white temperament and noble black, cherry blossom pink, champagne gold 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 the cross-border goods