Product Description Brand new and unopened. Since it doesn't cover your ears, you can hear the sounds around you even while listening to music, audio streaming, or the audio of videos! Even while listening to music while doing housework, you can hear your children's voices and the intercom. Even while listening to music while playing sports, you can hear the sounds of your surroundings, cars, and bicycles, providing peace of mind! It's a perfect new-sense tool for listening while doing other things! Since you don't insert it into your ear canal, you can reduce the risk of otitis externa. It's recommended for those who dislike canal-type earphones that are inserted into the ear because there's no feeling of blockage or pressure. How is it different from bone conduction? Bone conduction vibrates the temples (skull) and transmits the sound to the cochlea (the tissue that transmits sound to the brain). On-ear speakers are small speakers with a highly directional design that direct sound towards the ear. Achieving an ultra-lightweight 18g, you can use it comfortably even during sports or for long periods. You can use it comfortably because there is no tightening or vibration like bone conduction. Battery consumption is reduced, allowing for 10 hours of continuous playback. Speaker? Does sound leak? It has a design that places a highly directional rectangular speaker and directs the speaker's opening towards the ear canal, making it difficult for sound to leak to the surroundings. It also comes with a call microphone function, and it's ultra-lightweight, so you can enjoy long phone calls easily and hands-free. Bluetooth 5.0: Auto-pairing Waterproof "IPX4" Supported profiles: A2DP, AVRCP, HFP, HSP Supported codecs: SBC Multi-pairing: 8 devices Driver: 8mm wide x 9mm high rectangular driver Playback frequency band: 200Hz～7,000Hz Impedance: 32Ω Output sound pressure level: 123dB±3/1kHz Maximum input: 75mW Weight: Approximately 18g Battery capacity: 120mAh Charging time: Approximately 1.5 hours Maximum continuous playback time: Approximately 10 hours Maximum continuous talk time: Approximately 9 hours Maximum continuous standby time: Approximately 300 hours Charging port: micro USB Accessories: Charging cable (50cm) #ALPEX #Does not cover the ears #Lightweight #Waterproof #Black #Hi-Unit #Black #Earphones ALPEX Does not cover the ears Lightweight Waterproof Black Hi-Unit Black Earphones