This machine is not as big as a lighter, with a length of 6.2 cm, a width of 2.4 cm and a thickness of 1.17 cmYou can make and receive calls, send and receive text messages, ringtones for incoming calls, or mutePluggable mobile GSM or Unicom GPRS card to make calls, send and receive informationBluetooth connection with communication devices such as smart phones without inserting a cardWhen used as a bluetooth dialer, you can answer and hang up calls and listen to music wirelesslyCan store 500 phone numbers, address book Bluetooth one-key synchronization low radiationThis machine is an independent small mobile phone, you can make and receive calls directly by inserting the cardThe phone has a lanyard hole to hang the lanyard, it's really small, very smallFull set of 40g, super light, not heavy with ears