Rolton K600 7.4V Bluetooth Audio Speaker Megaphone Voice Amplifier Without Transmitter, Without Transmitter Color:Black com/products/laboratory-digital-colony-counter-cm#product"

com/products/laboratory-digital-colony-counter-cm#product"

Maximum SPL: 130 dB SPL (1KHz

The ease of use and clear visibility make it an excellent teaching tool across various disciplines

3 cm) for Feng Shui/Travel

Rolton K600 7.4V Bluetooth Audio Speaker Megaphone Voice Amplifier Without Transmitter, Without Transmitter Color:Black com/products/laboratory-digital-colony-counter-cm#product"1. K600 Bluetooth amplifier, no button, can not insert the card, can not be inserted into the U disk playback, only the amplifier function 2. Note: the need to achieve the wireless function to be equipped with a separate transmitter or wireless microphone. 3. Easy to wear, can be buckled in the belt or pants on the edge of the belt can also be used to hang waist belt, can be freely adjusted 4. Bluetooth 5. 0, compatible with the connection of