Sennheiser VMX200 VoiceMAX Mobile Bluetooth Headset Elegant in design and sophisticated in abilities, the tiny VMX 200 Bluetooth business headset features not just one, but two built-in microphones, which can determine which direction sound comes, just like the ears and the human brain. The built-in software then detects unrelated noise and cancels most of it out, sending only voice back over the telephone. Extremely small and lightweight - Weighing just 10g, providing excellent comfort for hours on end Bluetooth Version 3.0 Includes 1 x ear hook; 4 x ear sleeves (S/M/L); 1 x wall charger; 1 x USB charging cable; 1 x quick setup guide Up to 6 hours Charging time 2 hours Standby time Up to 10 days Range 10 m Weight 10 g