Function parameters: 1. Bluetooth function.2. TF card play. Bluetooth 3.0 support. Enjoy wireless to make life more exciting.Bluetooth range of 10 meters， high-speed data transmission.Hidden microphone， with bluetooth connectivity dialogue.High-quality speaker system provides powerful bass-driven stereo.Support TF card digital stereo music. Compatible formats: MP3， WMA， WAV， etc.Support DJ Radio arbitrary listen.Look no further， buy it now! Parameters: Bluetooth: V3.0+EDRProtocol: A2DP， AVRCP， HSP， HFPFrequency range: 2.4-2.4835GEffective range: 10mFrequency range: 87-108MHzCharging port: Mini USB Charging time: more than 2-3 hours Charging current: 500mACharging voltage: 5VBattery type: lithium batteryBattery capacity: 400mAHFunction parameters: 1. Bluetooth function: Press on "M" key to enter bluetooth mode. Blue and green light flash alternately. Headset bluetooth start to wait for connection. Start cellphone bluetooth to set and choose search， it will pop up "such as KG-5012" to match connection. When it connects successfully， green light flash. Then you can choose music to play. (Part of cellphone connection need to input password "0000")2. TF card play: Insert TF card into earphone slot. Press "M" to switch read card mode， green light flash and the system can decode audio format file you want to play. Then you can listen to music. 3. Charging:Please power headset off before charging. Connect headset with computer USB port with charging cable. When headset lightens red， it proves successful connection and is being charged. When light is off automatically， it proves full charge. (Built-in battery of headset has protection function.)Notes: 1. The headset is not waterproof. Please put it in dry place to ensure normal performance. 2. Mainly support computer USB port charging. Please do not change or connect to external power supply. 3. The headset cannot be idle for a long time. Please ensure one charge and discharge per week to extend battery life. 4. When in charge， please do not open headset power supply. Otherwise， it will do harm to headset hardware and battery life. Accessories: 1 x Headset， 1 x Mini USB cable， 1 x 3.5mm audio cable， 1 x Chinese&Englilsh user manual. 1 x Bluetooth headset 1 x USB cable 1 x Audio cable1 x English user manualIn original package