Boss WL-20L

WL-20L is functionally identical to the WL-20 model, except that it eliminates cable tone simulation. This feature makes it the best choice for instruments where the cable's capacitance has a minimal or no effect on the sound, such as an acoustic/electric guitar with a built-in preamplifier, a guitar or bass with active pickups or a line-level device like a keytar or the Roland Aerophone digital wind instrument. The WL-20L also works excellently with passive pickups, if you do not need the subtle high-frequency roll-off provided by cable tone simulation.

Receiver:

• Frequency: 2.4 GHz
• Compatible channels: 14
• Operating distance: 15 m
• Latency: 2.3 ms
• Dynamic range: 110 dB
• Frequency response range: 20 Hz - 20 kHz
• Indicators: POWER, RECEIVE
• Operating time of up to 10 hours 
• Charging time: Receiver - approximately 3 hours, Receiver + Transmitter - approximately 4 hours
• Power: Rechargeable Lithium-Ion battery
• Dimensions (H x W x D): 38 mm x 87 mm x 25 mm
• Weight (with included batteries): 60 g

Transmitter:

• Battery indicator
• Connectors: Micro USB port type B for DC power IN 5 V, TRS input connector
• Power: Rechargeable Lithium-Ion battery
• Operating time of up to 12 hours 
• Charging time of up to 3 hours
• Dimensions (H x W x D): 36 mm x 87 mm x 22 mm
• Weight: 43 g

Included accessories in the package:

• User manual
• Transmitter
• Micro USB cable for charging