Features:Adopt BT5.0 chip, high-speed and stable, automatic memory pairing after the first use, automatic power-on pairing is taken out from the charging chamber, and the memory is connected back.With display screen to show the remaining power , and equipped with TF card slot (up to 32G) to support MP3 audio playback.Intelligent touch control headphones, no need to press, switch songs, volume increase or decrease, playback pause and other functions, easy to operate.User-friendly in -ear headphones, built-in high-definition microphone, intelligent noise reduction, high-quality calls, no earache for a long time.Built-in 380mAh rechargeable battery, charging for one hour, the charge of the battery can be maintained for 7 days, standby for 20 days.Specifications:Model Number: N18BT Version: BT5.0Transmitting Distance: 10m/33ft (no obstacle)Frequency Range: 20-20000HzSensitivity: 108dBImpedance: 16ΩCharging Box Capacity: 3.7V 380mAhEarphone Battery Capacity: 2 * 3.7V 25mAhCharging Time: about 1.5 hoursEarphone Talk Time: 2 hoursTF Card Memory: 2GB(Up to 32GB)Material: ABSColor: Black, White, Pink (Optional)Package Size: 9*9*2.5 cm / 3.54*3.54*0.98inPackage Weight: 61g / 2.15ozPackage List:1 * Pair of Earbuds1 * Charging Box1 * Charging Cable1 * User Manual