Product Description: BM01 Blue - The World's Smallest 2-in-1 Miniature Cell Phone with Bluetooth and Dual SIM Miniature Phone: Experience the convenience of the world's smallest Bluetooth miniature cell phone. The BM01 supports dual SIM Nano cards or one SIM and one memory card (not included), making it an ideal communication tool for users on the go. Its compact size ensures it fits effortlessly into any pocket or bag, providing seamless connectivity wherever you are. Music Player and Bluetooth: This compact device doubles as a Bluetooth music player, offering a fun and portable way to enjoy your favorite tunes. With clear voice quality and a strong Bluetooth connection, its perfect for streaming MP3 music from your smartphone, ensuring your music is always accessible. Less Radiation: Prioritize safety with a phone that emits significantly less radiationonly 1/7 of what general smartphones produce. This makes the BM01 an excellent choice for protecting pregnant women and babies from signal radiation, allowing you to use it with peace of mind. Band (2G): The BM01 operates on GSM 850/900/1800/1900MHz frequencies, compatible with 2G, 4G, and 5G SIM cards, provided they support 2G GSM frequency. Please ensure your SIM card supports 2G networks if you plan to use this phone as a standalone device, as some carriers have phased out 2G networks. Voice Changer: Add a playful twist to your calls with the built-in voice changer feature, which requires a SIM card. This innovative function brings novelty and excitement to your communication experience, making every call unique and entertaining. Embrace the compact versatility and fun of the BM01 Blue, a perfect blend of functionality and entertainment in a sleek, vibrant design.