TUCAS GSM table phone is a table phone uniquely designed as with GSM function. It is Dual SIM and accept any SIM card of your choice. It has a micro memory card for your audio music. It does every functions of a mobile phone. TG20 comes with high capacity 2000MAH battery( that battery can last up to 2 weeks when fully charged). This is rated the best table phone, used in offices and homes.