Feature: 1. Miniature Phone: The world smallest BT miniature cell phone. Supports dual sim Nano cards (or one sim + one Memory card) (not included).This miniature cellphone is a versatile communicating tool for users on the go. 2. Music Player and BT: A fun electronic small tool that serves as a BT music player. Provides clear voice and high BT connection for MP3 music players on smartphone. 3. Less Radiation: Radiation rate is only 1/7 lower than that of general smartphones, making it the best phone to protect pregnant women and babies from signal radiation. You can use it with confidence. 4. Band (2G): GSM 850/900/1800/1900MHz ( suitable for 2G, 4G, 5G Sim Cards, but should support 2G GSM Frequency) Some sim card carriers have cut off 2G networks, please make sure that your sim card supports 2G networks when you use it as a stand alone phone. 5. Voice Changer: Change your voice during calls (this feature requires a sim card). This function offers a playful and innovative touch to your communicating experience. The voice changer adds a touch of novelty and excitement to your phone calls. Specification: Item Type: Miniature Phone Material: ABS Frequency Band Suitable for: GSM 2G 850/900/1800/1900MHz Display Screen: 0.66 inch OLED / 64x48 Standby Time: Approx. 72 hours Built in Battery:Battery 380mAh Support Multi language: Multi language Memory Card: Maximum Support 64GB (not included) SIM Card: Standard SIM Card (not included). Package List: 1 x Mobile Phone 1 x Charging Cable 1 x User Manual