Brand: Sena

Manufacturer Part Number: SPIDER-ST1-01

Features: Bluetooth,Noise Cancellation,Volume Control

Head unit only.  NO ACCESSORIES!

Used like new, fully working and in good condition.  

Will come with a 1 year warranty through our company from the day of delivery.

Features:

• Mesh Intercom 2.0 Technology
• Compatible only with other Mesh equipped intercoms (30 and 50 series Sena units for example)
• Multi-channel open mesh intercom (up to 9 channels)
• Bluetooth 5.1
• Low-profile design
• Simplified jog dial and two button layout
• Hands-Free Profile (HFP)
• Advanced Audio Distribution Profile (A2DP)
• Voice prompts can be commanded by 11 different languages (switching firmware with each language)
• Mesh Intercom: Working distance up to 2.0 km (1.2 mile) in open terrain
• HD speakers
• Music sharing
• Audio Multitasking
• Charging time: 1 and a half hours for full charge equals 11.5 hours of mesh talk time
• Advanced Noise Control
• Built-in SBC Codec
• Wide volume control
• Smartphone app

The main difference is that SP88 is an older model of the Sena Spider ST1 headset, while SP105 is the newer version. The SP105 version received a firmware update that enables Mesh 3.0, which is not compatible with the older SP88's Mesh 2.0 system. While both are called Spider ST1, the newer SP105 has more functions due to the updated firmware. 

Feature	SP88	SP105
Model	Older version of the Sena Spider ST1	Newer version of the Sena Spider ST1
Mesh Intercom	Mesh 2.0	Mesh 3.0 (requires firmware update)
Compatibility	Limited to other Mesh 2.0 devices	Compatible with both Mesh 2.0 and Mesh 3.0 devices
Functions	Fewer functions compared to the SP105	More functions, including the new Mesh 3.0 technology