Bluetooth 4.0 Headset, FTXJ Mini Smart Convenient S530 4.0 Stereo Bluetooth Headset Earphone Earbud (Black) Small and light, stealth design. Dimensions:3cmX1.7cmX1.2cm/1.19"X0.67"X0.48" Bluetooth version:V4.0 + EDR Support A2DP:music playback (audio output: 35mW, Play / Pause) Multi-point connections can be connected to two one with two Bluetooth devices simultaneously 4 hours talk time (music playback three hours / standby time 120 hours / working current &lt;15mA)