To appreciate life, go with i5! Enjoy life without boundary. Bluedio I5 Bluetooth stereo headset is a kind of technology aggregation. I5 is a multipurpose headset of Soulmate series, for enjoy wireless music "connect" with your soul. With innovative use of 3rd generation In-ear earphone crafted by Bluedio, built-in 14.2mm neodymium driver and 3.5mm gold-plated stereo plug, tonal quality is richer resonance than purer and implicit, just like listen to Boesendorfer sound. Black and White design of I5 are imitate to keys of piano. Superior sound isolation by including silicone ear piece, ergonomically designed to provide comfort in your ear. Micro-SD mode let you play all your favourite songs and transfer documents to your card via cable. Thus, the use of FM mode can listen to your radio channel. Also, you can connect 2 mobile phones simultaneously wirelessly, work as a BT receiver connect your phone with amplifier. Specification: Bluetooth Version: V3.0 Operating Distance: Up To 10m(free space) Support Profile: A2DP, AVRCP, HSP, HFP Talk Time: around 6hrs Bluetooth Music Playtime: around 6hrs Standby Time: around 100hrs Charging Time: around 1.5-2hrs Frequency Response: 20Hz-20kHz Sensitivity: 112dB Weight:10g> Size:55.8*23.6*17.6mm Accessories: I5 BT Headset 1pc Earphone 1pc USB charging cable 1pc User manual 1pc