Plantronics Professional Lightweight Single-line 2.4GHz Cordless Convertible Noise Canceling Telephone/headset System Ideal for Home and Small-office Use DECT 6.0 (1.9 GHz) wireless technology limits interference from wireless networks and home appliances during calls for superior sound and range of up to 300 feet Noise-canceling microphone blocks out background noise for enhanced sound clarity Convertible headset design can be worn either over-the-head or over-the-ear Dial pad offers up to 10 hours talk time or 8 days standby on a single charge One-year limited warranty