1. Wireless microphone makes you move freely and do energetic and active performances 2. The rechargeable and portable receiver only needs to charge for long time 3. Plug and Play, cable-free, frequency automatic pairing, AA battery-powered handheld microphone, and 18650 lithium rechargeable battery powered receiver makes it portable (Note: The AA batteries and 18650 batteries are not included) 4. The microphone can be connected to multiple audio systems including speakers, amplifiers, wireless mic systems. Wireless microphones will give you the mobility and freedom of movement for stage performances, speeches, churches, weddings, etc. 5. Material: ABS 6. Signal-to-noise ratio: Greater than or equal to 70dB 7. Frequency response range: 100Hz-20KHzSpecification: Package Weight One Package Weight 0.24kgs / 0.52lb One Package Size 30cm * 12cm * 8cm / 11.81inch * 4.72inch * 3.15inch Qty per Carton 20 Carton Weight 4.56kgs / 10.05lb Carton Size 50cm * 42cm * 32cm / 19.69inch * 16.54inch * 12.6inch Loading Container 20GP: 396 cartons * 20 pcs = 7920 pcs 40HQ: 921 cartons * 20 pcs = 18420 pcs