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Tws-N21 Bluetooth Earphone Smart digital display bluetooth headset Comfortable to wear ●Upgrade portable flashlight ●Upgrade smart fingerprint touch ●Noise reduction version: CVC8.0 ●Bluetooth 5.2 Smart Chip ●LPX5 waterproof and sweat proof ●9D sound experience ●Automatic power on + automatic pairing ●Large-capacity charging compartment for long-lasting battery life ●Support smart phones, tablets, PCs, support IOS, Android, windows Instructions for use Previous song: Double-click the left earphone Next song: Double-click the right earphone Play/pause: click any earphone Volume +: 3 times left ear Volume -: 3 times right ear Summon siri: long press for 3 seconds Answer a call: click once Reject call: long press for 2 seconds Product Details Model ：N21 Bluetooth ：V5.2 Use distance ：10m Music time : ≈35hours （with charging box） Stangby time : ≈55hours Charging time :1 h Products include: 1 * N21 1 * charging cable 1 * User Manual 2 * Replaceable Pads Set