Item Type: Earphone Material: ABS+Aluminum Alloy Bluetooth Version: V5.0+EDR Signal Transmission Distance: 20m / 65.6ft Bluetooth Transmission Frequency: 2.402-2.484GHz Support Agreement: Headset / Handsfree / A2DP / AVRCP Talk Time: About 4 Hours Music Playback Time: About 4 Hours Sensitivity: -423dB Speaker: Diameter 6mm / 0.2in /32/Typ Charging Interface: Micro Input Specifications: DC 5V-1A Battery Capacity: Earphone: 50mAh; Charging Compartment: 500mAh Purpose: Listening to Music, Talking Package List 2 x Headphone 1 x Charging Compartment 1 x USB-Micro Charging Cable 1 x Instruction 8 x Earplugs 1. When playing music, please adjust the music to an appropriate volume to avoid longterm high volume damage to hearing.2. Please charge in a safe place, please unplug it in time after charging fullyAccording to the safety regulations for battery use, the battery is not disposed of as household waste, which will cause the battery to leak electrolyte materials.3. Do not put the earplugs directly in the sun to explode.4. Try to avoid using the headset where there are sources of interference, otherwise it will affect the headset signal.5. Try to avoid using the headset in a corrosive environment, so as not to affect the function of the headset. 1Bluetooth 5.0 highperformance chip, intelligent automatic pairing, improve transmission rate, and smooth sound quality. 2Support single earphone use and dual earphones at the same time, stable signal, longterm use. 3Small and light, in line with ergonomic ear design, ultrastable fit, not easy to fall, and comfortable to wear. 4HiFilevel sound quality, surround sound, high resolution, bring an excellent music experience. 5Compatible with Bluetooth devices such as phones, computers, tablets, support for Windows/Android/iOS operating systems.