PowerTel 601 Wrist Shaker is a device designed for people with hearing impairments which notifies them whenever the phone rings. The device vibrates when there is an incoming call. It also allows users to answer calls in speakerphone mode at the press of a button, and press the emergency button to automatically dial emergency. However, this is only done when PowerTel 601 is used with PowerTel 680. Furthermore, it has up to 50 hours charge, and splash proof design for use in the shower. The product is also available with an additional transmitter for PowerTel 680.