1. Screen with sound 2. 2-inch HD display, real-time synchronization of mobile phone screen 3. Wi-Fi screen projection, Bluetooth 4. 5G/2.4G enhanced dual-band, no delay and no jamming 5. Compatible with various software such Product name:X40H mini selfie screen (with sound) Input:5V/1A Usage time:1-3 hours Screen size:2-inch HD screen Rated power: 1.85 watts Battery capacity: 850mAh Wireless network: 2.4G/5G dual-band Bluetooth 5.0 Compatible system: IOS 9.0+, Android 2.0+ Interface: TYPE-C USB cable Online upgrade of overseas languages Real-time screen projection within a transmission distance of 5-20 meters Product size:63.57x43.13x15mm Product weight:44g Color:Black Material:plastic Package Contents: 1 * Wireless Selfie Monitor Screen 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.