• 【Bone Conduction Technology】Sounder X4S utilizes advanced bone conduction technology, delivering clear audio without blocking your ears, ideal for maintaining situational awareness during outdoor activities.
• 【Waterproof Design】Engineered to be water-resistant, these earphones are perfect for intense workouts and running in various weather conditions.
• 【Long Battery Life】Enjoy up to 8 hours of playtime at 70% volume on a single charge, ensuring your music lasts throughout your longest adventures.
• 【Quick Charging】With a charging time of approximately 2 hours, you can quickly power up your earphones for extended use.
• 【Lightweight Comfort】Weighing only 25g, the Sounder X4S provides a comfortable fit for extended wear during your activities.
• 【Bluetooth-compatible 5.0 Connectivity】Featuring Bluetooth-compatible 5.0, these earphones offer stable and efficient wireless connection up to 10 meters range.

Specifications:

• Model: X4S
• Bluetooth-compatible Version: 5.0
• Battery Capacity: 150mAh
• Weight: 25g
• Charging Time: Approximately 2 hours
• Playtime: 8 hours (at 70% volume)
• Transmission Distance: 10 meters
• Charging Input: 5V/500mA
• Bluetooth Protocols: A2DP/AVRCP/HSP/HFP