Jabra BT8040 Bluetooth Headset (Black) Requires mobile phone or music player with embedded A2DP Bluetooth streaming music profile Up to 6 hours of talk time, up to 200 hours of standby time DSP (Digital signal processing) technology, active noise reduction, and intelligent volume equalization Third-generation Jabra ear gel for a comfortable in-ear fit without a hook Up to 6 hours of talk time, up to 200 hours of standby time