Sunda International Industrial Co., Ltd. is a professional manufacturer of dual sim card/twin sim cover/twin sim adapter/double sim holder/ twin sim card, Mp3 player, Mp4 player, Car MP3 FM Transmitter----Car Mp3 player, Car Mp4 player, Car FM Modulator, bluetooth dongle, card reader etc.

1) Two numbers both active synchronously
2) Switch online or Auto-switch online without turning on-off
3) Max 999 minutes available for you to self-set two sims auto-switching time individually
4) No data lose when switching 2 numbers or turning on-off
5) Super slim design with special general dual sim card IC for stable quality
6) Show Actual number on screen, number editable
7) Compatible with all GSM cards(include 3G)
8) Best compatibility in this field to the newer mobiles
9) Language select(Chinese/English/pyccknn/Turkce)
10) Maintain their original STK function
11) 100% Satisfaction Guaranteed.