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Enjoy a clean, wireless listening experience with the V2S V12 Bluetooth Earphones—compact in-ear headphones designed for easy daily use with smooth connection and built-in convenience features. Key Features - Wireless Bluetooth connection for hands-free listening - Built-in microphone for convenient calls - Volume control for on-the-go adjustment - Tested before shipment; contact customer service if any issues after receiving Battery & Charging - Battery capacity: 135 mAh - Standby time: >120 hours - Use time: 7.5 hours - Charging time: ≤2h - Charging voltage: USB 5V - Working voltage: 3.4V ~4.2V Audio & Connection - Bluetooth version: V4.2 - Effective distance: 10M - Frequency response: 20Hz ~ 20KHz - Frequency range: 2.402G ~ 2.480G - Speaker specification: Φ10mm Comfort & Design - Headphone weight: 40g - Earphone/Headphone type: In Ear What’s in the Box - 1 x Sports Bluetooth Headphones - 1 x USB Charging Cable - 1 x Use Manual - 3 x Earpiece Boots Compatibility - Audio Compatibility: Mobile, PC & Laptop Warranty - Warranty Duration: 1 Month - Warranty Type: Supplier Warranty Instructions for Use - After receiving the goods, if there are any problems, please contact customer service. Thank you for your support and understanding.