Feature: 1. The Bluetooth headsets enables you to enjoy great sounds on‑the‑go. Comfortable fit make sure the headset stays tightly when you are out running, jogging or exercising and doing other activities. 2. Bluetooth 5.0 technology, easy and fast pairing with smartphones, tablets and other Bluetooth enabled music devices and providing high quality stereo sound for compatible devices. 3. Ergonomic in‑ear headphones design to specifically fit the contours of your ears, and a 10‑meter working distance, our sport headphones will let you enjoy music when exercise. 4. Built in 50 mAh lithium polymer battery , enjoy about up to 3‑4 hours of premium quality talk/play time (full charges approximately 2 hours), up to standby time. 5. The two headsets can be used simultaneous or separately based on your need. Without the wire, the earphones can be easily carried on and stored. Specification: Item Type: Wireless Headset Material: ABS Color: Black Bluetooth Version: V5.0 + EDR Wireless Frequency: 2.4GHZ Support Protocol: A2DP1.3 / HFP1.6 / HSP1.2 / AVRCP1.6 / D11.3 Transmission Distance: 10m/32.8ft Battery: Headset 50mAh lithium battery, charging compartment 1200mah lithium battery Charging Voltage/Current: 5V/1A Speaker Impedance: 8MM 32Ω Microphone Sensitivity: -42dB How to Use 1. Make sure there is electricity in the charging compartment. If there is no electricity in the charging compartment, please charge it (pick up the two earphones and put them back and cover the lid. The indicator of the charging compartment is on to indicate that there is electricity, and if it is off, it means that there is no electricity). 2. Take out the two earphones from the charging compartment and put them on the left and right ears respectively, the earphones will be automatically turned on and paired automatically. 3. Turn on the bluetooth of the mobile phone and click the connection pairing name F9 to connect and use. . Package List: 1 x Instruction Manual1 x Pair of Headphone1 x Charging Box2 x Pair of Ear Caps1 x Charging Cable Note: Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.