Tips: Pairing mode: Keep pressing the switch on/off Button until Blue light remains Bright Based on more than million sales quantities around the world, Bluedio launched T9+ Bluetooth mono headset. Inheriting the feature of previous generation, Bluedio T9+ still keep its light weighted with 4 gram only, plus stable transmitting technology of Bluetooth 3.0, to keep stable of talking quality. It"s design for your convenience. T9+Technical Specification: Bluetooth Version: 3.0 Supported Profiles: HFP HSP Standby Time (hrs): Up to 100hrs Talk Time (hrs): Up to 4.5hrs VOIP: Support Multipoint Technology: YES Music Streaming: No Multi-function Button On/Off: Yes Standard Bluetooth Features: Yes Headset Weight: around 4g Operating Distance: 10m Battery: Built-in rechargeable Li-on polymer battery Charging Plug: A/C charger Micro-USB Accessories T9+ Mono headset 1pc Ear hook 1pc Micro-USB Charging Cable 1pc User manual 1pc