PIQ and Babolat Tennis Sensor
Tech specs 
Dimensionssensor: 44mm x 38.8mm
Weight9.8 grams
Battery life8 hours
Water resistanceIP67 Waterproof
Internal memoryYes
DisplayLED display
Sensors9 axis sensor, gyroscope, accelerometer, magnetometer
Smart watch compatibleNo
RemovableYes
Compatible brandsAll
Metrics 
PowerYes
SpinYes
Impact locationNo
Number of shotsYes
Shot typeForehand, backhand, serve, overhead.
Spin typeForehand, backhand, serve, overhead.
Swing speedYes
Ball speedNo
Live trackingYes
Video functionNo
OtherPIQ Score: A combination of your swing speed, your spin and your style (The fluidity) of your stroke.
POP Community: Compare your scores and other data with the Pop Community. Issue challenges to your friends for interactive fun and competition.
Links 
Affiliate link*Amazon
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