Only opened and tried on once. Brand: F.G.S Color: Black Ear Position: Open Ear Headphone Type: Open Ear Impedance: 16 Ohm Noise Control: Hybrid Noise Cancelling 【Clear calls even in noisy environments! 10 minutes of charging for 12 hours of talk time】Earaku Bluetooth Headset ENC Noise Cancelling, Ultra-Clear Calls, Dedicated Call Headset, 50-minute Quick Charge, Up to 19 hours of continuous playback, Dual EQ mode switching, 270° rotating microphone, DSP built-in, Bluetooth 5.3, Ultra-lightweight, for telework/web conferences/business (MicCuff J200) 【17 hours of talk time, 19 hours of music playback on a full charge】Supports all-day calls with a single charge: This headset boasts amazing battery life. With a single full charge, it can be used for 17 hours of calls and a remarkable 19 hours of music playback. 【2-WAY Dual EQ Mode Business Headset】Both music and calls: This Bluetooth headset is equipped with two EQ modes, "Voice Mode" and "Music Mode," to comfortably support your day! "Voice Mode" is perfect for business situations. 【Bluetooth headset supporting simultaneous connection of 2 devices】This Bluetooth headset supports your busy day with its multi-point connection function! You can connect up to 2 devices simultaneously, including Android, iOS, and Windows. 【36g ultra-lightweight × 270° rotating microphone! Supports comfortable calls】A Bluetooth headset perfect for business is here! The ultra-lightweight body of only 36g won't put any strain on your ears or head even after long hours of wear. 【IPX5 Waterproof × Comfortable Fit for comfort in any situation!】Here's a Bluetooth headset that supports your day with robustness and comfort that won't be defeated by rain or sweat! With IPX5 waterproof specifications, it can withstand sudden rain and sweat from intense exercise, and it performs stably even during outdoor work or jogging.