Digital Display Wireless Collar Amplifier Little Bee Multi-Function Portable Speaker Amplifier for Teacher Tour Guide Convenient connection: built-in chip, automatic pairing when starting. Fast connection: wireless directional technology pairs quickly. Stable connection: walk around at will within 20M, without interruption. Loud and clear: DSP noise reduction+anti-howling algorithm Convenient wireless microphone loudspeaker for teaching meeting: large volume/anti-howling/long battery life. 24-hour long battery life, 2000mAh lithium battery Bluetooth version 5.2 wireless connection Type-C fast charging interface Color:As Shown Material:plastic Package Contents: 1 * Loudspeaker 1 * Microphone 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.