Specifications: Bluetooth version: 2.1 + EDR Working range: 10m Talking time: 10 hours Music time: 8 hours Standby time: 160 hours Colors: black and white Working temperature: -15 to +55 degree centigradeHigh performance Style and comfortable Long talking time and long music time Long standby time Lightweight neckband Enjoy fast access to music Package Includes: 1 x Bluetooth Headset 1 x AC Charger 1 x User Manual