Description

SPECIFICATIONS

Hign-concerned Chemical: None

Type: Wrist ball

Type of sports: Strength Training

Training Site: ARMS

Training Site: Hand

Training Site: Wrist

Function: ARMS

Feature1: Record total number of revolutions

Feature2: Record instant speed

Feature3: Record Top speed

Feature4: 90s/60s/30 Countdown

Feature5: 5 Challenge Colors

Choice: yes

semi_Choice: yes