1. Double speaker design, louder, more mellow tone2. Bluetooth wireless transmission, wireless distance stable 15 meters3. Support FM radio, TF card playback4. Insert the memory card can be recorded, automatically saved, can be designated to play in a loop, very suitable for the use of sales promotion5. Built-in 2000 mA lithium battery, standby time 80 hours, can be used while charging6. Note: the need to achieve wireless functions to be equipped with a separate transmitter or wireless microphone.Parameters:1. Material process: UV process + ABS plastic2. Power: 5W3. Charging voltage: DC5V4. Function: amplification / recording / playback / radio5. Signal to noise ratio: 83dB6. Distortion: 1% (3.7V, 1KHz, 1W)7. Charging time: about 3.5 hours8. Size: 11 x 7.8 x 3.3cm9. Weight: 147gPacking list:Audio speaker x 1Wired headset microphone x 1USB data cable line x 1Belt x 1Instruction manual x 1Specification: Package Weight One Package Weight 0.30kgs / 0.67lb One Package Size 18cm * 14cm * 8cm / 7.09inch * 5.51inch * 3.15inch Qty per Carton 98 Carton Weight 30.00kgs / 66.14lb Carton Size 50cm * 50cm * 60cm / 19.69inch * 19.69inch * 23.62inch Loading Container 20GP: 177 cartons * 98 pcs = 17346 pcs 40HQ: 412 cartons * 98 pcs = 40376 pcs