Specification: Product Name: V8 Color: Black, White Product Size: 5.7 x 1.8 x2.4cm Bluetooth Versions: ISSC V4.1 + EDR Effective Distance: 10 Meters Support Agreement: Headset HFP A2DP AVRCP Play Music Time: Continue Play About 3-4 Hours Taking Time: Continue About 3-4 Hours Standby Time: About 72 Hours Power Level: Class II Charge Power: 5W Charge Voltage: DC 5V 1A To Switch The Headset Power On/Off: 1.To Power On: Press and hold answer/end key about 3 seconds until flashes blue; 2.To Power Off: Press and hold for about 6 seconds, goes off. To Pair The Headset With A Bluetooth Enable Phone: 1.Press and hold answer/end key until flashes blue and red; 2.Set Phone to search for Bluetooth device; 3.When phone finds headset(Name: HM1600), confirm by selecting the headset from list, it will connect automatic (If need enter pass code is: 0000); 4.If Pairing was successful, starts to flash blue, indicating in standby mode and ready to make / receive calls. To Redial The Last Called Number: -Single press the answer/end key twice (2 short presses) when headset is in standby mode. To Activate Voice Dialing: 1.Your phone must support this function, when in standby mode press and hold the answer/end key for 3 seconds when in standby mode; 2.Speak or say the number to dial, follow User Guide of your phone, record voice tage through headset for the best and the most accurate result. Package Include: 1x Bluetooth Headset 1x Ear Hang 1x USB Cable 1x Vice Single Earphone Cable 1x Manual (Not Include Other Devices) Ships in 7 business days. It is shipped from China. Delivery is provided by China Post Air Mail. Delivery time depends on the couriers, local customs in your country also holidays, weather conditions. Usually it takes from 39 to 60 days, depending on the customs at your country.