This will be the 3.7V charger shipping with the MI58 systems when they come back in. The charge in the body pack charger MP8 cost has gone through the roof.

Mipro MI-580R 5 GHz Digital Stereo Body-pack Receiver

CLICK THE PICTURE FOR DETAILS ON THE MI580R

Housing Reinforced plastic  / Display Backlit graphic LCD Control Interface ACT sync sensor, setting buttons and volume control Frequency Range ISM 5.8 GHz Receiving Mode True diversity Audio Mode STEREO / MIXED L / R Balance Adjustment Allows shifting the stereo output toward the left or right channel. ENG Mode Yes, up to 16 sets (requires transmitter setup) EQ FLAT / LO-CUT / LO-BOT / HI-BOT Frequency Response 20 Hz – 23 kHz (stereo) Dynamic Range ≥ 109 dBA (system) Stereo Separation > 100 dB THD < 0.1% @ 1 kHz Latency Approx. 1.8 ms (group B) Sensitivity 5 μV (S/N > 100 dB) Output Power Left/Right × 100 mW @ 16 Ω Earphone Jack 3.5 mm TRS Power Supply One 18500 Li-ion battery or two AA alkaline Battery Charging USB Type-C Operating Time > 8 hours Accessories E-9 / E-8S (optional) Dimensions 63 × 95 × 25 mm (W × H × D) Weight Approx. 160 g

Just like its big brother the Mipro MI909, the MI-58 will be a superior system when compared to what else is in the market in the under $700 range.  The build is solid and professional. When I compare the competition, I always find myself looking at a component and thinking, "Well this is Mickey Mouse." No such parts on the MI-58 - Solid and well built. When you look at the MI909 page on my site, you will see lots of parts. That is all that ever goes wrong Mipro. Lost antennas, knobs, belt clips etc. The systems are built to last. I still have plenty of clients around the world still using the discontinued 808TR analog system 20 years later.

The MI-58 system is fully digital. With the 5.8GHz frequency range, I was unable to find a channel that was not open (this was a real treat). 

Better Frequency Range - Bass players check this out. Due to the wider bandwidth, the frequency range is greatly expanded to 20Hz-23kHz. For comparison, the Sennheiser G4 is 25Hz-15kHz, the Shure PSM300 is 25Hz-15kHz and the Shure PSM900 is 38Hz – 15kHz.

The MI-58R Belt pack is the industries smallest, most lightweight fiberglass reinforced on the market. Granted, if you are the size of Andre the Giant, that is not relevant. But let us say you are one of those players that keeps the belt back in a pocket (heaven forbid) or, a female singer that needs to clip in under a dress or theater groups where belt pack real estate is tight. The MI-58R Belt pack is a game changer. The MI58 Belt Pack is powered by one ICR18500 Li-ion Rechargeable battery and has a backlit LCD screen. The latency is 2.2ms (REAL LOW). 

The MI-58T Transmitter is housed in a half space metal case with an OLED Display Screen. Audio sampling has a 24-bit / 48kHz Rate. An available option is a RJ-45 DANTE interface.

Range: My warehouse is 150 feet long and I never walked out of the signal. The volume and clarity stayed consistent throughout my warehouse.

I would recommend some additional batteries that you can have charged as backups. I did notice a drop in performance right at the battery’s life. And like any other IEM system, a freshly charged battery before your show is simply good practice.

Check the drawing below. I'd recommend just two systems per band. Give me a ring and I'll explain that. Mike 513.375.3302