Poly Savi 7220 Binaural Wireless DECT Headset System - Talk time: Up to 12 hours - Headset wireless range: up to 120 m - Battery Capacity: 250 mAh - Battery Type: Rechargeable lithium-ion polymer - Charge Time: 3 hours - Wireless technology: DECT - Receive frequency response: Narrowband mode: 300-3300Hz, Wideband Mode: 100–6800 Hz - Microphone and technology: Noise cancelling - Weight: 138g - 213020-03 - 12 Months Limited Warranty