Features 1、[Zinc Alloy Material and Detachable Strap]This voice recorder wristband is made of zinc alloy material, ensuring long lasting use. The strap is detachable, making it easy to clean and replace. Suitable for wrist sizes from 5.6 to 8.2 inches. 2、[Large Storage Capacity and Long Recording Time] Equipped with a 16GB internal memory, this digital voice recorder can store up to 72 hours of recording files at 512kpbs. Never worry about running out of space during important meetings or lectures! 3、[One Key Recording and Voice Activation] This wristband recorder features a one key recording function, allowing you to start recording quickly in any situation. It also supports voice activated recording, automatically starting when sound is detected. 4、[Multiple Formats and Adjustable Settings] This recorder supports MP3/WAV formats, providing flexibility in playback options. It also features adjustable volume and screen brightness settings, allowing you to customize the device to your preference. 5、[Powerful Battery and Security Features] With a built in 150mAh lithium battery, this recorder can work for 8-9 hours on a single charge. It also features password protect and auto save functions, ensuring your recordings are safe and secure. Specification Model: SK-503 Memory: 16GB File Storage: 72hrs (512K, WAV) Liquid Crystal Display (LCD) Size: 0.96inch TFT display Screen Resolution: 80*160 Pixels Input 5V 1A Output: 3.7V Battery: Built in lithium battery 150mAh 3.7V Playing Format: MP3 Charging Time: About 2 hours Discharging Time: 8-9 hours Recording Format: MP3/WAV Working Temperature: 0℃～40℃ Transmit Interface: MICRO 5PIN USB2.0 System Support: for Win XP for Win 8 Size: 63.5x25x14.3mm System Language: Simplified Chinese and English Net Weight: 38.2g Package List 1 x Voice Recorder 1 x Charging Cable 1 x Earphone 1 x User Manual