Technical Details: Version 5.0 of Bluetooth Profile on Bluetooth: HFP/HSP/A2DP/AVRCP Chipset for Bluetooth: JL6976D Input for Earphones: 5V, 30mA Input for the charging case: 5V, 350mA 32Ω is the impedance. Regularity 2.4GHz–2.48GHz is the range. Two hours are needed to charge. Playtime: Five Hours Time on Standby: 50 Hours Capacity of Earphone Battery: 30mAh*2 Charging Case 350 mAh is the battery's capacity. Type of Battery: Lithium Polymer Ten meters is the operating distance. Qualities: Real Wireless Technology Wireless Earbuds with Total Freedom: More stable transmission, surround sound quality, and faster pairing speed are all features of the newest True Wireless Technology (TWS) earbuds. The Promate FreePods-2, which offer remarkable transmission speed without signal loss, will therefore relieve you of the inconvenience of tangled cords. Amazing Audio Quality for Crystal-Clear Songs: The dynamic speaker driver reproduces your crystal-clear sound with strong bass, a gentle midrange, and a distinct treble.