Marshall Mode II , Wireless In-Ear Headphones, Bluetooth 5.1, Up to 5 hours operating time, maximum 25 hours operating time with charging case, Up to 10 m Bluetooth range, Waterproof earphones IPX5, Splash-proof charging box IPX4, Frequency range: 20 - 20,000 Hz, Maximum level: 100.5 dB (179 mV @ 1 kHz), Impedance: 16 Ohm, 6 mm Driver, Includes charging case, charging cable and ear pads (S/M/L/XL)