Compatible Devices: MP3 Players Hardware Interface: Micro USB 2.0 Type A Microphone: Built-in Audio Format: MP3 Audio Headphone Jack: 3.5 mm Number of Batteries: 1 Non-standard Battery (Included) Product Dimensions: 11 Depth x 23 Width x 97 Height mm Memory Storage Capacity: 32 GB Item Weight: 30 grams About this item: High-sensitivity dual silicon microphone DSP HD noise reduction Bluetooth call recording Intelligent voice recording New and unused Unused items have not been tested for operation. Instant purchase welcome, no need to ask for permission. First come, first served, only one left! Other products are here: #memeるかりshop s791 $$2999