Bone Conduction Headphone IP68 Waterproof Bluetooth Wireless Headset for Swimming Item Type: Headphone Material: ABS Soft Rubber Weight: Approx. 107g / 3.8oz Bluetooth Name of Headset: Y9 Waterproof Level:: IP68 Storage Capacity: 32GB Bluetooth Version: 5.0 Microphone Sensitivity: -37dB Battery Capacity: 300mAh (Built-In Battery) Support Music Formats: MP3, WMA, WV, APE, FLAC Temperature Range: -40℃ - +70℃ Charging Port: Magnetic Charging Stand Working Frequency: 20HZ-20KHZ Standby Time: 120 Hours Speaker Power: 0.5W Charging Time: 1.5 Hours Music Playback Time: 4-5 Hours Support Bluetooth Protocol: AVRCPI. 4, A2DP. 2, HFP1. 6HISP1. 2 Single or Dual Ear Channel: Bilateral Stereo Channel: Stereo Headphone Type: Bone Conduction Uses: Headset Function: Suitable for swimming, battery display, call function, support music Applicable Gift-Giving Occasion: Birthdays, holidays, trade fairs, advertising promotions, employee benefits, anniversary celebrations, business gifts, opening ceremonies, awards commemoratives, public relations planning Key Description: 1. Switch on-off: Press the on button for 3 seconds, and it will enter MP3 playback by default; if there is an operation out of control and cannot switch on and off, press and hold the on button for 10 seconds to force a restart; 2. MP3/Bluetooth switch: in the power-on state, double-click the switch to switch MP3 mode/Bluetooth mode; Answering/hanging up: In the incoming call state, press the power button to answer the call, press again to hang up, and press once to switch the pause/play in the playback state, and it will automatically shut down when the playback is paused for 5 minutes without operation; Connect to Bluetooth: Double-click the power button in MP3 mode to switch to Bluetooth mode, the indicator light flashes red and blue, and the device searches for y9 to connect; Chinese and English sound prompts: 3 click on the key to switch between Chinese and English prompts +/-: Volume up/down: single press +/- key to adjust volume up/down; Up/down song: long press +/ key to switch up/down song; Random play/single loop/sequential play: double-click a key; Sound effect switching: double-click + key