Item Type: BT Neckband Headphone Material: Silicone, ABS Model: K1691 BT: V5.3 Transmission Distance: Approx. 15m/49.2ft Range: 20Hz-20KHz Sensitivity: 110DB3DB Impedance: 32 Speaker Specification: 14mm/0.6in Interface: Type C Charging Port Battery Capacity: 500mAh Lithium Battery (Included) Power: 10mW Charging Time: 2 to 3 hours Support Memory Card: Maximum 256GB (Not Included) Package List 1 x BT Neckband Headphone 1 x Charging Cable 2 x Spare Eartips 1 x Instruction Manual 1[RGB Light] Ergonomically shaped neckband Bluetooth headphone with cool RGB LEDs on the outside of the headphone provides multi color slow flash auto switching backlight lighting when in use, making it more fun to enjoy music and dance and cooler to play games. Support breathing light, fade and single color mode. 2[Stereo] Neckband earbuds headphone with 14mm drivers provide highly detailed treble with premium clarity and bass response. Delivers powerful bass, a detailed and full midrange, and pure, bright treble. Press the voice button to wake up the phone system's sound assistant, which supports most devices. 3[Long Battery Life] This wireless neckband headset built in 500mAh rechargeable lithium battery, 2 to 3H fully charged, standby time of 200 hours, no need to frequently charge the headset. With LED digital display, you can always check the headset power. 4[BT 5.3 And Support Memory Card] The headset uses Bluetooth 5.3 technology, low power consumption, fast transmission speed, no delay in calls, strong anti interference ability, more stable signal. Support Memory Card to play music, favorite music stored in the card, do not use the phone can also listen to songs. 5[Magnetic And Waterproof Design] Neckband headphone with magnets on the back of the two earbuds, can be adsorbed to each other to prevent the headphone from slipping lost, as well as tangled headphone cable. IPX5 life waterproof to prevent sweat damage to its components, so you can easily exercise.