Features: 1. 2.4G Wireless Microphone, 2.4G Wireless Communication, Automatic Pairing Mode (Insert And Play) 2. High Quality, Clear Sound, High Anti-Interference Ability (No Noise) 3. Long-Distance Signal Transmission, Signal Transmission And Reception, Wear-Resistant. 4. Suitable For Audio And Voice Amplifier Speakers With Auxiliary Input Port 5. Suitable For Teaching, Tour Guides, Sales Lectures/Introductions, Speeches/Meetings/Assembly Areas, Meetings/Announcements/Discussions Description: 1. Material: Plastic + Metal 2. Built-In Battery Capacity: 300 Mah 3. Type: Teaching Loudspeaker color: Black Package Contents: 2 x Transmitter 2 x Receiver 2 x Head Mount 2 x Adapter 2 x Charging Cable Note: Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use 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.