Transmission range: 10 meters
Function: Battery display, voice control, call function, support music, multi-point connection
Color: [S4-Z] Black (Chinese version), [S4-Z] Blue (Chinese version), [S4-Z] Yellow Green (Chinese version), [S4-Z] Red (Chinese version), [S4 -Y]Black (English version), [S4-Y] Blue (English version), [S4-Y] Yellow Green (English version), [S4-Y] Red (English version), [X7-PLUS] Black (Chinese and English switch), [X7-PLUS] red (Chinese and English switch), [X7-PLUS] blue (Chinese and English switch), [H916] black (Chinese and English switch), [H916] silver (Chinese and English switch) , [H916] pink (Chinese and English switch), [IX] black (Chinese and English switch), [IX] red (Chinese and English switch), [IX] black red (Chinese and English switch), [IX] white powder (Chinese and English switch ), [M2-E] white (switch between Chinese and English), [M2-E] blue (switch between Chinese and English), [M2-E] red (switch between Chinese and English), [M2-E] gold (switch between Chinese and English) , [M9-E] black (Chinese and English switch), [M9-E] red (Chinese and English switch)