About Product:Suggested retail price: $138.00 brand: YYM transmission range: 20 meters function: support music, phone, electricity, according to take, yituo two, tail replay processing custom: is printed LOGO: can be bluetooth protocol: 4.1 track: stereo way of use: if hang ear type single and double ears: bilateral stereo applicable gift-giving occasions: opening ceremony, the festival of colors: vibrant blue, green, cool classic black, classic white, bright red