Operation Guide:1. Redial a recent dialed call number:Double-click middle button when the headphone is in standby.2. Mute function:Double-click the middle button while calling.3. Audio switching between headphone and mobile phone:Press the middle button for 1s while calling. Switch the calling voice from headphone to smarphone(or smartphone to headphone).4. Connect to two devices:(1). After the first smartphone connect to headphone successfully, turn off headphone Bluetooth.(2). Turn on Bluetooth headphone, Long press the middle button until the indicator light turn to blue and red alternately. Search "QCY-QY19" on the second smartphone and connect.(3). Search the "QCY-QY19" from the Bluetooth list on the first smartphone, then connect.(4). Headphone connect to two smarphones successfully.5. Factory settings.Long press the middle button while the headphone is charging. Until the indicator light turn red and blue alternately.
<br />Specifications:General SpecificationModel Number	: QY19Optional Color: Black, White, Blue, GreenWearing Type: In-earProduct Weight (g): 12.7gDimensions (mm): 1.4x1.2x1.8inch/36x30x45mmTechnical ParametersBluetooth Version: V4.1Bluetooth Chip: CSR8645Voice Prompt: SupportSupport Protocol: HFP/HSP/A2DP/AVRCP/APT-XNoise Canceling: CVC6.0Unit Driver: 8mmSensitivity	: 100dBEffective Distance: 10mBattery Capacity: 74mAhMusic Time: About 6 hoursCharging Time: 1-2 hoursStandby Time: 155 hoursVoice Language: English Function: Answer/end call/reject/transfer/redial/mute/volume adjustment/pause music/switching songs/Package  Included:1 X Bluetooth Headphone2 X Pairs Earbuds2 X Shark Fin1 X Charging Cable1 X Manual<p> <b><b><img src="https://contestimg.wish.com/api/webimage/58a92120e993735bf4e6ef6f-original.jpg></b></b></p>