Clear audio The earphone presents you with crystal clear music playing and phone calls, perfect for daily uses like driving, working, video conference or doing sports, frees your hands and enhances safety. Great compatibility It can be paired with most mobile devices on the market like smart phones, computers or tablets, and play audios on almost all APPs, no restrictions, no burden. Lasting battery Each earbud is equipped with a 30mAh battery, and can work continuously for up to 2-3hours with the combination use with the 200mAh battery case, owns a standby time up to 100 hours. Small and compact The battery case is of a very small size and light weight that allows it to be put inside your pocket or purse and can be carried everywhere conveniently. Specifications: Type: Wireless earbuds Material: Plastic Color: Blue/Grey/Green/Yellow/Light Blue/Pink/Black Bluetooth Protocol: V5.0+EDR Supportive Protocol: A2DP1.3/HFP1.6/HSP1.2/AVRCP1.6/D11.3 Frequency: 2.4GHz Reception Distance: 12m/471inch/39ft Battery: Built-in 30mAh(earbud), 200mAh(case) Standby Time: 100hour(1bud), 60hour(2bud) Play Time: 2-3hour(1bud), 2-2.5hour(2bud) Size: 56*21*43mm/2.2*0.83*1.69inch (L*W*H) Weight: 45g/1.59oz