How do you choose the sound mode that suits you? 4-Speakers Design, Three Sound Effects Switching Bass mode, Human voice mode, 3D balanced mode, support 3 kinds of sound switching. Tips: Sound effect switching - Double click "C key" while working. Note: The game/music mode is switched by single click "C key", and the sound effect mode is switched by double click "C key". Don't worry after Sales：If you are not satisfied or the product breaks, even if you have used the bluetooth headphones, just send message to let us know and we will give you a satisfactory after-sales service. Why Choose 4 Speakers Neckband Bluetooth Headphones with Mic? 1. HURKEYE wireless neckband headphones, Long battery life and charge quickly: you can use these Bluetooth neckband headphones for 100 hours consecutively. Charge 10 minutes, listen for 10 hours. 2. Wireless earbuds with neckband, built-in noise cancelling microphones, you can enjoy clear calls. 3. Support voice-control your device: this neckband Bluetooth headset allows you to wake up your voice assistant such as Siri, Google Assistant, so you can easily voice-command your device without lifting one finger. 4. This Wireless bluetooth headphones is perfect for work, commute, listening to music/podcast/audiobook, daily life. 5. This bluetooth neckband earbuds is compatible with all Bluetooth-enabled devices such as cellphones/smartphones/mobile phones, PC, tablet, TV, etc. 6. It comes with soft eartips in 4 sizes, you can enjoy music in an more immersive and comfortable way. Tips: choosing the appropriate eartip can help you get the optimal listening enjoyment. 7. Unique magnetic design for around the neck headphones: both earbuds can be attached to the neckband when you do not use them and they naturally dangle around your neck, fashionable and lightweight. Moreover, you will never have the bother of losing the earbuds like other true wireless earbuds. 8. This neckband bluetooth headphones are sweat-reistant, and they can perfectly resist against sweat, light rain and splahses. HURKEYE Sports Bluetooth Headphones 4-Speakers Three Sound Effects Switching Bass mode, Human voice mode, 3D balanced mode, 4 speakers bass system, support 3 kinds of sound switching, to bring you beyond the iMAX theater level of shock sound. Tips： Sound effect switching - Double click "C key" while working. Power prompt - Click the" switch button" and the power display light will be on for 5-20s and then go off (the display time varies in different modes). Application scenarios: calling, movies, fitness, running, gym workouts, mountain climbing, cycling, etc. We look into the latest innovations and find products that can connect with our daily life to create the innovative product for people to capture the essential of technology. HURKEYE Bluetooth Headphones neckband Connect for the first time: 1.Long press 2s Power Button, Powe ON 2.the phone‘s Bluetooth to search for "A13", click to complete the pairing; 3.A13 will reconnect to your device automatically after the first time of pairing and use. Input: 4.2 V⎓500 mA Charging time: 2 hours Battery capacity: 800 mA Playing time: 100 hours Waterproof rating: IPX5 Bluetooth version: V5.0 Range: 10 m / 33 ft Bio-diaphragm, large moving coil acoustic structure A wonderful combination of carbon fiber composite diaphragm + large moving coil acoustic technology. Resonate under the action of magnetism and electricity to restore the melody of music, wireless earbuds with neckband. Type-C interface Type-C fast charging interface is adopted, 500mAh high current charging, 10 minutes of charging, 10 hours of listening, 2 hours of full charge, 100 hours of listening, bluetooth headphones neckband. Four battery indicators With a four-bar power display, click the" switch button" and the power display light will be on for 5-20s and then go off (the display time varies in different modes), earphones neckband bluetooth for easy operation. Game "0" lag The wireless bluetooth earbud support music/game mode switching, the new Bluetooth 5.0 chip greatly improves the connection rate, the game delay is as low as 60ms, and the non-inductive delay helps you enjoy the game. 3 sound effects Neckband bluetooth headphones with Subwoofer, vocals, 3D balanced sound effects, 4-speaker subwoofer system, support 3 kinds of sound effects switching, bring you shocking sound beyond iMAX cinema level.Bluetooth headset sport wireless with microphone. Intelligent noise reduction Filter out ambient noise for clear calls. Smart noise-cancelling calls, no need to worry about noisy environment or strong wind interference, high-definition calls without noise, chat with friends freely, around the neck headphones.