OXA (2nd Gen)Bluetooth Bracelet Wristwatch with Rechargeable Lithium Polymer Battery, Clear OLED Display, Incoming Call Notification, One Touch Call Answer and Music Player after Pairing with Most Smartphones Quick and easy charging of the Lithium-ion Polymer battery by connecting to any available USB port with up to 72 hours of stand-by time on a single charge Quick and easy setup of the Bluetooth wireless connection supports music or hands-free calling from your mobile phone with incoming call and out of range vibration notifications Clear OLED display of incoming and outgoing calls, 24-hour time format and a choice of up to 12 languages Max circumference 6.5 inches (more suited for a small wrist), excellent speaker and microphone sound quality Easily Synchronize your contact list to display incoming caller name and number