Battery: Rechargeable Lithium-ion Polymer 180 mAh
Charging time: 2 hours
Playing time @50% volume: 10H
Playing time @100% volume: 6H
Charging: 4 Point Magnetic to USB A 
Charging Input: 5V

Speaker: Bone conducting speaker XT60C
Frequency response: 20–20,000 Hz
Working Frequency: 2402–2480 MHz
Audio Format: MP3 WAV APE FLAC

Version: Bluetooth 5.3 (Out of water)
Chipset: JL7006FB
Bluetooth Profile: A2DP/HFP/AVRCP
Transmission Distance: Up to 20 meters

IPX8 Waterproof (Swim-Proof)

MP3 Capacity: 8GB (3200 songs)

Due to the fully waterproof mould of the product, the ESC Sounds Endurance does not contain a microphone

Product Size: 139 x 110 x 48mm / 5.47 x 4.33 x 188 in
Product Weight: 31.5g / 1.11oz

Surface: Silicone and Rubber Oil
Structure: Liquid Silicone and Titanium Alloy

ESC Sounds Endurance Earphones
Carry Case
C-Type USB Charging cable
Instruction manual
Adjustable Band
Earplugs