Increasing Worker Productivity And Organizational Cost Savings, The Spectralink 8400 Wi-Fi Phones Connect On-Site Professionals With Customers, Colleagues, And All The Applications They Need To Perform Their Best. Designed With The Requirements Of Mobile Workers In The Healthcare, Retail, Hospitality, And Manufacturing Industries In Mind, The Spectralink 8400 Handset Unites The Most Critical Elements Of Workplace Communications Within A Single Mobile Device That Is Highly Reliable, Extra Durable, And Easy To Use. No Battery is included.