Features 1、Dual card dual standby - The mini phone can insert two SIM cards, or insert a SIM card and a memory card to expand the storage capacity. 2、Bluetooth dialing - After connecting with your smartphone, the bluetooth dialing and bluetooth answering can be achieved. Phone book, address book, music can be synchronized. 3、Built-in voice changer - The Bluetooth phone can change the sound of your voice, makes the communication with friends more interesting. 4、Low radiation - Maximum 0.283W/KG, about one seventh of the average cell phone(2.1W/KG). 5、MP3 / MP4 music player - Built-in player, enjoy your leisure time. Specification Note: If you want to use this product as a stand-alone mobile phone, please confirm whether the local area covers the GSM network and whether your GSM card supports the GSM network. Features: Dual card dual standby - The mini phone can insert two SIM cards, or insert a SIM card and a memory card to expand the storage capacity. Bluetooth dialing - After connecting with your smartphone, the bluetooth dialing and bluetooth answering can be achieved. Phone book, address book, music can be synchronized. Built-in voice changer - The Bluetooth phone can change the sound of your voice, makes the communication with friends more interesting. Low radiation - Maximum 0.283W/KG, about one seventh of the average cell phone(2.1W/KG). MP3 / MP4 music player - Built-in player, enjoy your leisure time. Large capacity - 380mAh battery standby time can be up to 10 days, and it can be removable. Clear sound quality and vibration mode - With high quality speaker, you can clearly hear each other even in noisy environments. Compact & Lightweight & Portable. Specification: Type: Mini Bluetooth Phone Model number: BM10 System: GSM Color: Blue, Gray(Optional) Battery: Built-in 380mAh lithium polymer battery Weight: Approx. 60g Size: Approx. 6.78 * 2.78 * 1.24cm / 2.7 * 1.1 * 0.5in Package list: 1 * Phone 1 * USB Cable 1 * User Manual