Sport Bluetooth in-ear headphones from Synchros Reflect series that were made specifically for the running and exercise, so for all actively living people. With wireless Bluetooth 3.0 connectivity with charging via microUSB they guarantee up to 5 hours of playback. Reflective cable resistant to sweat offers the possibility of length adjustment and three-button remote control with microphone with a sensitivity of -42dBV/Pa @ 1kHz. In addition, they feature special cable system with magnetic closing of headphones if they're not used, or 3 sizes of ergonomically designed ear pads that adhere well in the ears (S/M/L). JBL professional sound is guaranteed by dynamic 8.5 mm drivers of high quality. Bluetooth transmitter provides power <4 dBm, frequency range from 2.402 to 2.480 GHz and modulation GFSK BT /4 DQPSK 8-DPSK supporting BT 3.0, A2DPv1.2, AVRCP v1.4, v1.6 HFP, HSP v1.2. Headphones offer a frequency range of 10 Hz-22 kHz, maximum 106 db SPL, maximum input power of 4 mW. Included is a quick-start guide and safety warnings. Blue colour design.