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Product name SD Pro 1 – US Order name SD 20 – US EAN No. 40 44155 08833 5 UPC No. 6 15104 24742 0 Art. No. 506007 Product description Wireless DECT headset (single-sided) with base station for desk phone and softphone Technical Data DECT for US DECT 6.0 (1.920 to 1.930 MHz) GAP compatible Yes (Headset) Headset Connects to base station Base Station Connects to desk phone and softphone Headset Auto Link to Base Yes, can be activated on the base station Firmware requirement For newest version please use the Sennheiser Updater. Please check sennheiser.com/cco/software EHS (Electronic Hook Switch) Yes (accessory – order EHS adapter separately) Mechanical Hook Lifter HSL 10 (accessory – order separately) Softphone call control software For PC software enabling call control please check sennheiser.com/cco/software UC compatible Yes. For more information please refer to sennheiser.com/headsetcompatibility Microphone Frequency response Wideband Mode 150 Hz – 6.8 KHz Frequency response Narrowband Mode 300 Hz – 3.5 KHz Mute Microphone Yes Speaker Speaker type Neodynium Magnet Speaker Frequency response Wideband Mode 150 Hz – 6.8 KHz Frequency response Narrowband Mode 300 Hz – 3.5 KHz General Data Operational temperature range +41 °F to +113 °F Storage temperature range -4 °F to +158 °F Weight headset 2.3 oz Ear pad size ø 1.96 in Battery (Lithium Polymer) Exchangeable for service (see User manual) Personalization Yes with nameplate on headset Range – line of sight 590 ft Range – in typical office building 180 ft Automatic power adjustment Yes (distance between headset and base) Talk time in Wideband Mode Up to 8 hours Talk time in Narrowband Mode Up to 12 hours Stand by time Up to 100 Hours Auto – headset OFF when out of range Yes ➠ after 30 minutes Charge time 0 – 50% 20 minutes Charge time 0 – 100% 1 hour Packaging Package dimensions (H x W x D) 6.50 x 6.30 x 6.30 in Package weight 30.27 oz Safety Automatic Acoustic Shock Protection YES ➠ ActiveGard® EU/AUS Limiter depending on regional variant YES ➠ Activation by dip switch Delivery content Headset Base Station USB cable Power supply Audio phone cable Printed Quick Guide CD with Setup Guide, User Guide, Quick Guide and name plate template Printed Safety Guide