Bluetooth Version: v5.0 Bluetooth Profile: HSP, HFP, A2DP, AVRCP, AAC, DSP Bluetooth Chipset: JL 6936d4 Earphone Input: 5V, 40mA Charging Case Input: 5V, 240mA Impedance: 32Ω Frequency Range: 2.4-2.48GHz Charging Time: 1 Hour Playing Time: 5 Hours Standby Time: Up to 80 Hours Earphone Battery Capacity: 45mAh*2 Charging Case Battery Capacity: 240mAh Battery Type: Li-Polymer Operating Distance: 10m