Use either of the IPX4 TWS wireless bluetooth earbuds one at a time for calls and music, or you can switch freely between twin mode and mono mode. It provides you with lossless sound quality, so you can get a clear call experience. IPX4 waterproof can easily resist sweat, which is very suitable for running, yoga, hiking, driving or other outdoor activities.The earbud fits easily into your ear, comfortably and safely. Features: Transmission distance:10-12m Single Battery Life: About 2.5H Charging Time: 1.5H Battery Capacity: 300mAh Type of Battery: LITHIUM Waterproof Level: IPX4 Price Includes: Free setup Free 1c1p silkscreen imprint Free virtual proof Free logo PMS matching Free standard shipping to 1 continental US commercial location Lead Time (including shipping time): Standard Service (business days): Production time: 7-15 business days for up to 5000 pcs; 15-25 days for more than 5000 pcs. Shipping time: 7-10 days. Rush Service (business days): Product Detail: Type: Earbuds Capacities: Standard Colors: Black, White, Yellow Imprint Methods: FCP/Silkscreen Imprint Location: Charge box - front Imprint Size: 1.38 X 0.98 inches MOQ: 100 Item Dimension (inch): 5.91 X 3.15 x 1.38 inches Item Shape: Irregular Material: ABS (plastic) Standard Package: Box Item Weight (g): 75 Add-Ons with Extra Charges: Customized body color (MOQ 1000 pcs) FCP imprint Additional color imprint Additional location imprint Residential address delivery