BT58 (semi-metallic tube body)-2

Designed specifically for live streaming, karaoke, and public speaking, this device is widely used in sound cards, amplifiers, and outdoor speakers. It employs UHF wireless technology and automatic frequency pairing, offering easy operation, strong anti-interference capabilities, and a range of approximately 30 meters in open areas. With 30 adjustable channels to avoid frequency interference, it supports simultaneous use of multiple microphones. The receiver integrates a small-sized packaged chip, making it portable, plug-and-play, and easy to connect to various audio devices. A φ3.5mm adapter is included for easy connection to audio devices with φ6.35mm interfaces.

SKU: BT58 (semi-metallic tube body)-2 Category: Wireless Handheld Dynamic Microphone System

Description

General Specifications

Frequency Range: 640-690MHz (segmented)
Number of Channels: Dual-channel
Number of Channels: 30
FM Width: 12.5MHz
Channel Spacing: 250kHz
Modulation/Demodulation: FM
Mute Control: Pilot/Digital ID
Frequency Response: 120Hz-17kHz (1kHz reference -3dB)
Frequency Stability: ±7kHz
Signal-to-Noise Ratio: ≥95dB
Dynamic Range: ≥90dB
Distortion: <1% (at 1kHz) Operating Distance: Approx. 30 meters (open area) Transmitter (Microphone) Pickup Type: Dynamic Phenolic Directionality: Unidirectional Sensitivity: -55±3dB dB (0dB=1V/Pa/m at 1kHz) Gain Adjustment: -18dB 21dB Transmitter Power: ≤10mW Power Supply: 2 AA Batteries Receiver Audio Output: Φ6.5mm Line Output Battery Type: 18650 Lithium-ion Battery Battery Specifications: 3.7V / 1200mAh Charging Specifications: USB 5V / 200mA (Maximum Battery Charging Current) Charging Time: Approx. 2 Hours Usage Time: Approx. 5 Hours

Additional information

Package Contents	Two USB/Type-C charging cables, one 18650 rechargeable battery, one windproof cotton pad, one anti-slip ring, one adapter plug, and one instruction manual and certificate of conformity.