Files transmission is not available for models with iOS system.
Files transmission is not available. USB debugging is only used for upgrading software.
The method to connect this smart watch phone and your phone refer to the user manual.OS:Android 7.1CPU:MTK6739Cores:Quad CoreRAM:1GBROM:16GBExternal Memory:Not SupportedWireless Connectivity:3GWIFI:802.11a/b/g/n/ac wireless internetNetwork type:GSM+WCDMA+TD-SCDMA+TDD-LTE+FDD-LTEFrequency:FDD-LTE: B1/2/3/5/7/8/12/17/20Support 3G :YesGPS:YesBluetooth:YesBluetooth Version:V4.0Screen type:AMOLEDScreen size:1.39 inchScreen resolution:400 x 400Camera type:Single cameraBack camera:8.0MPSIM Card Slot:Single SIMTF card slot:NoSpeaker:SupportedPicture format:GIFMusic format:MP3Video format:MP4Languages:Multi-languageAdditional Features:2G,3G,,,,,,,,MP3,MP4Functions:Anti-lost alertSmartwatch Phone:1Screen Protector:1Charging Cable:1English Manual :1Package size:12.00 x 10.50 x 6.50 cm / 4.72 x 4.13 x 2.56 inchesPackage weight:0.250 kg
HB - 20 Mini Invisible TWS In-ear Stereo Bluetooth Earbud● Lightweight and compact: ultra-small sports wireless Bluetooth 4.2 mini earbuds, with lightweight and compact portable design, simple and stylish● Bluetooth wireless: compatible with most Bluetooth-enabled devices, this will connect automatically with a phone paired previously, the wireless range up to 10 meters, it offers you the wireless freedom, and it gives you the most comfortable wearing experience● Eliminate noise echo: can eliminate noise and echo very well, perfect for stealth listening or watching at work● Support phone talk: support multipoint connections, can connect two mobile phones at the same time and ready to answer the incoming call of one phone anytime, with microphone handsfree calling● Built-in Li-ion battery: standby time is about 80h, up to 3 hours of continuous talk time and music timeFunction:Answering Phone,Bluetooth,Microphone,Sweatproof,Voice PromptMaterial:ABSModel:HB - 20Type:In-EarWearing type:In-EarApplication:SportCharging Time.:1.5hCompatible with:Computer,Mobile phoneConnecting interface:Micro USBConnectivity:WirelessFrequency response:20-20000HzImpedance:32ohms ± 10 percentMusic Time:2 - 3hPlug Type:USBSensitivity:98dBStandby time:80hTalk time:2 - 3hBluetooth:YesBluetooth distance:W/O obstacles 10mBluetooth mode:Hands freeBluetooth Version:V4.2Battery Type:Built-inBattery Types:50mAh Li-ion Battery