​Headphone battery capacity; 25mAh polymer battery ​ ​Charging box function; The main body can charge the earphone for 2-3 cycles time ​ ​APP language; English, Chinese Simplified, Chinese Traditional, German, French, Arabic, Czech, Greek, Spanish, Japanese, Persian, Italian, Korean, Dutch, Polish, Portuguese, Russian, Finnish , Swedish, Thai, Hungarian, Slovak, Croatian, Albanian, Turkish, Ukrainian, Hindi 26 languages ​ ​Watch anguage; English, Chinese Simplified, Chinese Traditional, German, French, Arabic, Czech, Greek, Spanish, Japanese, Persian, Italian, Korean, Dutch, Polish, Portuguese, Russian, Finnish , Swedish, Thai, Hungarian, Slovak, Croatian, Albanian, Turkish, Ukrainian, Hindi 26 languages ​ ​Compatible systems; Android 4.4 and above; ios 8.0 and above