Plantronics Savi W440, W740 replacement/spare headset for the Plantronics Savi W440, Plantronics W440-M, Plantronics W740 wireless headset system. This is the spare headset in case you lost or broke your Plantronics Savi headset. This is genuine Plantronics Spare headset for the Plantronics Savi W440, W440-M. It will not function without the Savi W440, W740 base, but it will sync up with your existing W440, W740 amplifier/charging base. It comes with charging cradle and battery included. Portable and lightweight, top class PC sound.