What's in the box:

Muslady UR-4 Professional Digital Wireless Microphone System with XLR Transmitter and Receiver Built-in Lithium Battery Connect to Audio Mixer Loudspeaker DSLR Camera Amplifier for Live Streaming Interview (Black)

Feature:
Microphone wireless system feature XLR interfaces, just plug on and turn your favorite mics into wireless mics.
Adopting advanced wireless UHF technology, the signal transmission becomes more stable.
Equipped with 10 groups of channels, you can switch the channel as your requirement, so as to avoid interference from other equipments.
Built-in rechargeable lithium battery, support continuous working up to 3 hours, after being fully charged.
Widely applicable for live streaming, recording studios, meeting, speaking, interviewing, karaoke, etc. Get rid of wire limitations, allowing you to enjoy the fun and convenience of wireless.

Specification:
Brand: Muslady
Model: UR-4

-- Transmitter --
Microphone Max Input: 1.5VRMs
RF Carrier Frequency Range: 901m-910m
Max Transmitting Power: 8dbm
Working Temperature: -20?-80?
Working Current: 120mA
Battery Capacity: 700mAh
Transmitter Size: 9.2 * 3.1 * 2.1cm / 3.6 * 1.2 * 0.8inch
Transmitter Weight: 67g / 2.4oz

-- Receiver --
Max RF Input Signal Amplitude: 10dBm
Receiving Carrier Frequency Range:90m-910m
Receiving Sensitivity: -85dBm
Audio SNR: 96dB
Working Temperature: -20?-80?
Working Current: 120mA
Battery Capacity: 1500mAh
Receiver Size: 9.9 * 3.1 * 2.1cm / 3.9 * 1.2 * 0.8inch
Receiver Weight: 82g / 2.9oz

Package Size: 15.8 * 15.8 * 3.5cm / 6.2 * 6.2 * 1.4inch
Package Weight: 360g / 12.7oz

Packing List:
1 * Transmitter
1 * Receiver
2 * USB Cables
1 * User Manual

Note:
By default, the first channel is set as the preferred pairing channel everytime starting up.