1、DUAL SIM: World's smallest Bluetooth headset mini cell phone supports dual sim Nano cards (or one sim and one memory card) (not included). 2、BLUETOOTH MUSIC PLAYER: Mini cell phone can be used as a Bluetooth music player with clear sound, and can also be hung up as Bluetooth headphones. 3、LOW RADIATION: Mini button phone radiation rate is 1/7 lower than the general smart phone, it is the best phone to protect pregnant women and babies from signal radiation. 4、GSM BAND: Smallest phone is suitable for GSM 850 900 1800 1900MHz ( 2G, 3G, 4G, 5G Sim Cards are available, but must support 2G GSM Frequency). 5、VOICE CHANGER: Smallest unlocked phone comes with a voice changer, you can change your voice while talking (this feature requires sim card). Item Type: Smallest Phone Material: ABS Frequency Band Suitable For: GSM 2G 850 900 1800 1900MHZ Display : 0.66 Inch Organic Light Emitting Diode, 64x48 Standby Time: 20 Hours Built in Battery: 380mah Lithium Battery Product Size: Approx. 6.9 x 2.8 x 1.3cm/2.7 x 1.1 x 0.5in Multi Language Support: English, French, Spanish, Danish, Polish, Portuguese, Italian, German, Malasian, Dutch, Vietnamese, Russian, Arabic, Hebrew, Thai, Greek, Swedish, Croatian and 24 Other Languages 1 x Cell Phone 1 x Charging Cable 1 x Instruction Manual