TWS Over-Ear Wireless Earphone Long Battery Life Bluetooth 5.2 Sports Open-Ear Hook Cordless Stereo Never Drop Off HiFi Headset Press the left earphone button or right earphone button 4 times to turn on/off night running mode What is the difference between over ear earphone and in ear earphone? In ear earphone is plug into our ear, it will be painful and hurt our ears if long term wear. It shield the external sound, so it maybe not safe when driving in case of something dangerous.Over ear earphone just hang over our ears, not into ear, it is comfortable and health. We can hear the external sound while we use it. That is much more safer for driving and good for our communication with others.Due to the feature of the over ear earphone, there will be little some sound leak from the earphone if the volume is too loud. Please buy in ear earphone if you do mind. How to turn on/off the night running mode? Press the left earphone button or right earphone button 4 times to turn on/off night running mode How to change the language from Chinese to English some pcs may be the Chinese language, please just turn on the switch,do not connect Bluetooth,double click the switch button. then you can change the language into English. More details if you want to know: Specification: BT version: V5.1 BT protocol: a2dp\avctp\avdtp\avrcp\hfp\spp\sm-p\att\gap\gatt\rfcomm\sdp\l2cap Working current: 6-8mA Charging voltage: DC5V Charging current: 100MA Battery capacity: 100mAh Charging time: 1.5H Listening time: 14H Talk time: 12H Standby time: 90 days Frequency range: 2.4G Effective distance: about 8-10m/26.25-32.81ft Speaker parameters: Sensitivity: 1183db(at 1KHz 1mW) Impedance: 3215% Frequency range: 20-20KHZ Output power: 5mW Headphone charging box performance parameters: Battery capacity: 500mAh Input voltage: DC 5V Input current: 300MA Output voltage: DC 5V Output current: 200MA Charging time: 2H Rechargeable times: 2 times Static standby current: 20Ua Overcharge protection: 16v Undervoltage protection: 2.9v Packing List: Headphones*2pcs Charging compartment*1pcs Charging cable*1pcs Manual*1pcs Notes: 1. Due to the different display and lighting effects, the actual color of the product may be slightly different from the color shown in the picture. 2. Due to manual measurement, please allow a measurement deviation of 1-3cm.