Check the listing for details. Singtronic SP-224Pro Rechargeable 2 x UHF Wireless Microphone (100% Battery). Color: Black, Condition: New. Listed at 249.00 USD. Singtronic.com has released Newest 2025 Wireless Microphone Karaoke System Model: SP-224Pro that is operates at 100% Hands Free and No Power Voltage needed. The SP-224Pro is difference from all other Wireless Microphone in the market, because its using Rechargeable Batteries built inside both the Receiver & Wireless Handheld to power up and running for the entire venue. Its powerful lithium battery can last up to 6 ~ 8 Hour per Full Charge. Which mean can be using to sing karaoke at any place without power voltage. Its perfect usage for outdoor occasions like: Camping, Parks, RVs, Churches and ect....Package Include:2 x Rechargeable Wireless Handheld Mics. Built in Volume, Echo, Bass, & Trebble1 x Rechargeable Wireless Receiver with Lock Freq.2 x Antennas1 x Mini-USB Charging Cable1 x Wall to USB Adapter1 x 1/4" to 1/4" Mics Connection CableSpecifications:Receiver: Rechargeable Battery or Plug in DC 5VHandheld Wireless: Metallic BodyIndividual Volume Control: Bass, Trebble, Echo, ChannelCarrier Frequency: 470MHz ~ 960MHzModulation Mode: FMPeak Deviation: 45KHzAudio Response: 50Hz ~ 15KHzComprehensive SNR: >105dB (A)T.H.D at 1KHz: