Dell Latitude 5540 (2023) 15.6″ FHD IPS, 13th Gen Intel Core i5-1345U vPro, 16GB DDR4 (Customized), 512GB Gen4 M.2 PCIe NVMe, Titan Grey Business Laptop (3 Years Warranty)

Driver size: 40mmDynamic frequency response range:20Hz-20kHzSensitivity: 96dBMaximum SPL: 111dBMicrophone sensitivity @1kHz dBv/pa: -42Wireless transmitted power: 0-4dbmWireless transmitted modulation:GFSK, n/4DQPSK, 8DPSKWireless frequency:2.402GHz-2.48GHzWireless profiles: HFP v1.6,HSPv1.2, A2DP v1.2, AVRCP v1.4Impedance: 320hmWireless version: V5.3Battery type: Polymer Li-ionBattery (250mAh)Charging time: 2 hoursMusic play time with BT on:Up to 6 hours