Video And Audio Synchronization Camera Pen Bracelet $ 24.91 Product information: Commodity type: new Recording mode: HD Recording format: WAV Recording time: 180 (minutes) Memory card type: does not support expansion cards Transmission interface: USB 2.0 Microphone: two-way Recording distance: 5-10 meters Video: Support video shooting Battery: Lithium battery Shell material: special ABS Product size: 522614 (mm) (mm) Product weight: 32 (g) Color: English black, black + OTG Capacity: 8GB, 16GB, 32GB, 64GB, 128GB Packing list: Recording product1 Manual 1 Data line1 Warranty card1 Packing box*1