Lenovo TWS HT20 makes music more pleasant. Sweat and splash proof can let you enjoy outdoors activities. This earphone features a ultra stylish design, exquisite workmanship, lightweight and portable, easy for you to carry. Dynamic coil dual units structure will deliver you crystal clear sound. Features: High-quality optimization of exclusive patent. This earphone features a ultra stylish design, exquisite workmanship, lightweight and portable, easy for you to carry.High definition and subwoofer stereo sound quality Qualcomm 3020 chip, support aptX high-resolution music.Support master-slave switchingSilicone ear muffs and soft cable Not easy to knot or twist, offers longer service time for you.BT5.0, speaker with Penetrating Sound: Provides crystal clear sound, you can enjoy your music world. Drivers for brisk sensitivity Driving dual rear chamber reverb, delivers crystal clear enjoyment.Support for SIRI voice controlIntelligent Noise Reduction: Quality audio with a streamlined aesthetic.Compact and High-Quality and bring an outstanding listening experience, fits home or outdoor activities.In-ear ergonomic design: With soft silicone fish beak type earbud tips, directly lead the music into your ear cavity and isolate the outside noise, comfort your ears as well.User-friendly On-cord controller: Integrated controls for volume adjustment, music play, and calls High blind control recognition, simple and quick one-hand control you can switch song, play / pause music, answer / end call and adjust volume.Specification: Realtek 8763BRC Bluetooth version: V5.0 Frequency: 2.402-2.48GHzSupport protocol: HSP / HFP / A2DP / AVRCPCall duration: 5-6 hours (single)Music playback time: 5-6 hours (single)Bluetooth transmission distance: about 10 mSpeaker output power: 2 ~ 5 mWStandby time: 150 ~ 180 hoursHeadphone battery: 601015, 60mAhCharging box battery: 752445,800mAhCharging time: 1 ~ 2 hoursCharging interface: charging box Micro-USB, earphone: copper post / probe.Transmission power: Class 2Charger requirements: DC 5V ± 0.25V, current ≤1AHeadphone indicator: red, blue; charging box indicator: blue.Pairing name: HT20 (HT20 is left and right, case sensitive)