Up to 13 hours battery life Great for long wireless calls Incredible wireless range USB adapter (no base) Durable, portable 1 year limited warranty Passive Noise-Cancellation Goes beyond the highest DECT Security Level C 3 wearing styles 52 Hours standby Engage 55Portable. Productive. Professional. Engineered to make every call count.INTRODUCING ENGAGE 55Everybodys talkingHave better conversations, both at home and in the office, with Engage 55. This intuitive headset is designed for those who spend most of their day in calls or virtual meetings, giving you an extensive wireless range and the highest levels of security, for maximum peace of mind.Whether youre working from home or a busy office, Engage 55 will keep you sounding professional for every single conversation, no matter whats happening around you.WIRELESS RANGEFree range (conversations, not chickens)Whether youre working from home or in the office, its nice to have the freedom to move around. Engage 55s compact USB DECT