AEC BQ618 Smart Wireless Bluetooth Stereo Handsfree Earphone with Microphone, Support 3.5mm for Phone Tablet PSPs Line Length:NoneWith Microphone:YesWireless Type:bluetoothBrand Name:AECConnectors:NoneWaterproof:NoActive Noise-Cancellation:YesSupport Memory Card:NoVolume Control:YesFrequency Response Range:20-20000HzResistance:25Vocalism Principle:Hybrid technologyModel Number:BQ-618Sensitivity:1105dBStyle:HeadbandSupport APP:NoControl Button:YesBluetooth Version:V4.1 + EDRSupported profiles:HFP, A2DP, AVRCPSupport Apt-x:NoProduct parameters: Speaker specifications: 30mm Output power: 32 ohms 45mW Frequency response: 200Hz-2000Hz Sensitivity: 120db3db Signal to noise ratio: 90DB Distortion: 0.5% Bluetooth standard: Bluetooth 4.1+EDR Supporting protocols: HFP, A2DP, AVRCP Support 3.5mm audio input Power supply mode: built-in lithium battery 190mAh Charging time: 3 hours (please extend the charging time for the first charge) Effective distance: 10 meters Working time: more than 10 hours Standby time: 250 hours Charging interface: Micro USB Built-in microphone to support digital signal processing echo cancellation technology Features: Smart Bluetooth, wireless HIFI Floating micro HIFI sound effect