Rolton K600 7.4V Bluetooth Audio Speaker Megaphone Voice Amplifier Without Transmitter, Without Transmitter Color:Black Its straightforward design requires no

Its straightforward design requires no batteries and operates independently without the risk of electrical failure

Adjustable foot margin: Special foot margin of nylon casting stainless steel screw

Maximum SPL: 130 dB SPL (1KHz

3 cm) for Feng Shui/Travel

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

Rolton K600 7.4V Bluetooth Audio Speaker Megaphone Voice Amplifier Without Transmitter, Without Transmitter Color:Black Its straightforward design requires no1. 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