Item Type: Recorder_x000D_ Model: Q37_x000D_ Material: Aluminum Alloy_x000D_ Size: Approx. 34 x 34 x 7.9mm / 1.34 x 1.34 x 0.3in_x000D_ Battery Capacity: Built In Lithium Battery 120mah (Shipped with Built In Battery)_x000D_ Recording Mode: One Key Recording, Wire Control Operation_x000D_ Recording Format: WAV, MP3, WMA_x000D_ Memory Card Type: Does Not Support Expansion Cards_x000D_ Transmission Interface: USB 2.0_x000D_ Recording Distance: Maximum Support 10m / 32.8ft_x000D_ Charging Time: About 1 Hour_x000D_ Playing Time: About 15 Hours_x000D_ Recording Time: About 20 Hours1Dual Recording Mode: The mini recorder supports one key recording and remote control operations, making recording easier. 2Use of Recording Lessons: Digital recorder with playback function, which can play back the recorded course audio, a good helper for learning. 3Large Battery Capacity: Fast charging only takes 1 hour, recording time up to 20 hours, and playback time up to 15 hours. 4Portable Size: This small size of the mini recorder has professional level recorder parameters to meet daily recording needs. 5Core Functions: One key noise reduction, power off protection, file encryption, intelligent voice control, local deletion, mp3 playback, etc.1 x Recorder1 x Headphone1 x Charging Cable1 x Instruction