Bluetooth Speaker - It is waterproof, solar panels made of patented diaphragm. Provide deep bass.
Outdoor climbing afraid of no electricity. Using Class D amplifier,
power good sound quality
High-power solar panels - Flatten after a 5V 1A solar charging panels,
three high-efficiency solar panels, can provide sufficient power,
even in households climbing also calls outside
Bluetooth keyboard - Other side is slim Bluetooth keyboard after smoothing. Available while typing, and listening to music