Our wireless earbuds adopt advanced Wireless V5.3 with high-sensitive inbuilt microphone, deliver crystal clear stereo sound. Dual earbuds can be worked as single track mode or stereo mode for multiple functions. Inbuilt 100mAh rechargeable battery of each earbud lasts up to 15Hrs music/talk time with about 1H fully charged. 950mAh Portable charging case can supply 3-4 times full charge of dual earbuds. Its soft and flexibal earhook design and 3-type earcaps (S-M-L) snugly fit your ear, secure and stable. With IPX4 waterproof performance, it\'s an optimal helper for car owners, white collars, businessmen, even sport amatuer during travel or daily life. Wirelss V5.3 & True Wireless: Wireless V5.3 version with high speed signal transmitting, offering impressive crystal clear stereo sound. Adopt high-sensitive microphone to reduce ambient noise, grasp the details of voice and offer crystal clear sound even in a noisy environment. True wireless dual ear stereo design, left and right earbud can be separated, that is, you can use its left and right ear headset solely (Single Track Mode), also can used them in pairs (Stereo Mode). Up To 60Hrs Stereo Audio & 120Hrs Single Experience: Get 15Hrs playtime from dual earbuds full charge, then prolong that to 60Hrs with the included charging case (for 6-8 times single earbud charge; 3-4 time dual earbud charge). Take the one earbud for single mode and leave the other earbud charging, extend music playing time from 60Hrs to 120Hrs. Auto TWS Pair & Easy Operation: Auto switch on and TWS connection of 2 earbuds when picking from the charging case and auto off once 2 earbuds put back into charging dock. And one multifunction key and /- button achieves simply and quickly fulfill almost all functions with one multi-functional button like answer/end a phone, play/pause, pairing, power on/off, voice assistant, volume up and down etc.. Comfort Design & Snugly Ear-fit: These in ear headphones with flexible earhooks. Each hook has been developed from soft silicone material that adapts to different sized ears, you will feel comfortable while doing sports and both wireless headsets will secure stay on ears. Besides, S/M/L size optional ear tips guarantee stable and comfortable for long time wearing. IPX4 Waterproof Wireless Earbuds: These wireless sport headphones are IPX4 waterproof,the surface of both in ear earbuds is sealed to prevent sweat or rain from entering, and the internal nano-coating to airborne moisture from damaging the components. Product Type: Wireless Earbuds Color: Black Material: ABS PC Wireless Version: V5.3 (Jerry6973) Wireless Connecting Name: YYK-Q63 Wireless Distance: ≤10m/3.28ft Wireless Working Frequency: 2.402GHz-2.480GHz Receive Sensitivity (TYP): -85dB Speaker Power: 3mW Earbud Battery: 100mAh Charging Case Battery: 950mAh Charging Case Charging Time: About 2Hrs Earbud Charging Time: About 1H Play Time: 15H (Per Earbud) Charging Port: Type-C (5V) Waterproof Rating: IPX4 Charging Case Supply Power to 2 Earbuds 3-4 Times, One Earbud 6-8 Times Standby Time: 120Hrs Support Protocol: A2DP\AVCTP\AVDTP\AVRCP\HFP\SPP\SMP\ATT\GAP\GATT\RFCOMM\SDP\L2CAP PROFILE\A2DP 1.3\AVCTP 1.4\AVDTP 1.3\ AVRCP 1.5\HFP 1.5 \SPP 1.0\RFCOMM 1.2\PNP 1.3 Speaker Diameter: 13mm Driver Speaker Impedance: 32ohm Speaker Frequency Response: 50HZ-20KHz Microphone Sensitivity: -42±3dB Noise Ratio S/N: ≧90dB Type-C Cable Length: 31cm/12.2in Per Earbud Size & Weight: 6*4*3cm/2.36*1.57*1.18in; 9g/0.02lbs Charging Case Size & Weight: 10*7*3.5cm/3.94*2.76*1.38in; 82g/0.18lbs Package Size: 16*16*5cm/6.29*6.29*1.96in Package Weight: 185g/0.40lbs 1Pair x Earbuds 1 x Charging Case 1 x Type-C USB Cable 2Pairs x Extra Earcaps (Small Large) 1 x User Manual