Features: 1. Jdy-23 Transparent Transmission Module Is Based On Bluetooth 5.0 Protocol Standard, And The Working Frequency Band Is 2.4ghz Range. 2. The Modulation Method Is Gfsk, The Transmission Power Is 4db, And The Transmission Distance Is 60 Meters. 3. It Adopts Chip Design And Supports Users To Modify The Device Name, Baud Rate And Other Commands Through At Commands, Making It Convenient, Fast And Flexible To Use. 4. The Jdy-23 Bluetooth Module Can Realize Data Transmission Between The Module And The Mobile Phone. By Default, Ble Bluetooth Can Be Quickly Used For Product Applications Without Configuration. 5. Make Ble Application In Products Faster And More Convenient Description: 1. Model: Bluetooth Module 2. Frequency Band: 2.4Ghz Note: Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Not Affect The Use Material: PCB colour: As Shown Package Contents: 5 x Bluetooth Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.