BTH-F9-5:Description:Color: white/blackMaterial: ABSPerformance: the Bluetooth-compatible headsetFeatures: LED power digital display + mobile power supply for mobile phone chargingApplicable model: applicable to all mobile phones and smart devices with Bluetooth-compatible functionBluetooth-compatible version: 5.0 + EDRProtocol mode: A2DP, AVRCP, HSP, HFPPrompt tone: EnglishEffective distance: 10M (barrier free)The microphone:Binaural pairing mode: automatic pairing after power onHorn diameter: 8mmImpedance: 32 ΩSensitivity: 42dbDistortion: ± 5%Battery capacity: headset 50mah, charging bin 3500mahHeadset usage time: 3-6 hours (depending on volume)Headset charging time: 1 hourBattery compartment charging interface: Micro USBUSB output: 5V 1AKey function: a pause/play, pick up/hang up, up/down switch (according to the music mode, press the power button two times)Single ear weight: 3GProduct size: headset 1.7 * 3 * 2.1cm; battery compartment 8 * 4.6 * 3cm