Headphones Philips ActionFit SHQ6500BL/00 Blue Wireless - Bluetooth 4.1 TYPE: Semi-open type /  Reproduction frequency band: 15 - 22 000 Hz /  Impedance: 32  /  Output sound pressure level: 106 dB /  Driver size: 13.6 mm /  Maximum input: 10 mW /  Waterproof specification: IPX 2 Corresponding profile of BluetoothR: A2DP / AVRCP / HFP / HSP /  Corresponding codec of BluetoothR: SBC /  BluetoothR version: 4.1 Continuous music playback (call) time: up to about 4.5 hours /  Continuous standby time: about 55 hours /  Charging time: about 2 hours Body weight: about 14 g accessories:  USB charging cable (15 cm) /  Secure fit fin (2 pairs) (large / small) /  Japanese Instruction Manual