Features: - Bluetooth Wireless - Flexible Neckband - Hands-Free Calling - Aluminium Housing - In-Line Control SPECIFICATIONS: Bluetooth Version: 5.0 + EDR Chipset: JL Profiles: HFP, HSP, A2DP, AVRCP Distance: 10 m Sensitivity: 105 dB Driver: ø10 mm Impedance: 32 ? Charge Time: 2 Hours Playback Time: Up to 8 Hours Battery Capacity: 135 mAh Frequency: 20 Hz ~ 20 kHz Charge Input: 5 V DC, 0.1 A What's in the box 1 x Earphones