Digital Signal Processing (DSP) makes the sound crisper and clearer, perfect for use in noisy environments such as a factory or food court. Fast automatic volume adjustment changes the volume depending on the situation, while Bluetooth 2.0 guarantees a stable link to your phone. The discreet new design fits snugly around your ear without a visible microphone boom, leaving your ear canal open so you can talk clearly to people face to face. The HBH-GV435 has up to 8 hours’ talk time and up to 300 hours’ standby time. The headset also facilitates auto pairing and redialing.