About this product:No extra power or battery needed, the water stream can provide power flow for LED lighting.The circle LED indicator light indicates blue, green or red light color according to the corresponding water temperature range (0~29: blue; 30~41: green; >41: red) ; People can relieve pressure and eliminate fatigue through color conversion.The color changes according to the temperature of the water passing through it. Made of ABS and TPR, eco-friendly, safe and durable for long term use. Multi-layer plating treatment ensures corrosion resistance and smooth surface. energy saving, environmental protection.A great replacement for the shower head sprayer, easy to install. The shower head handle plugs directly into your shower hose.Product 1. No extra power or battery needed, the water jet can provide a jet of energy for LED lighting.2.LED light circle indicates blue, green or red light color depending on water temperature range corresponding (0 ~ 29 29: blue; 30 ~ 41 : green; > 41 : red); People can relieve pressure and eliminate fatigue through color conversion.3.Color changes according to the temperature of the water passing through it. Made of ABS and TPR, eco-friendly, safe and durable for long term use.4.Multi-layer plating processing ensure corrosion resistance and the smooth surface. energy saving, environmental protection.5.A great home bathroom shower head sprayer replacement, easy to install. The shower head handle connects directly to your shower hose.Features:Condition: 100% New.Material: ABS .Color: Black.Male thread: G1 / 2.LED power supply: Hydroelectric generation (no need extra battery).Light color: Blue (0 ~ 29 ); Green (30~41); Red (> 41).Size (H x W): approx. 24 x 12.5 cm / 9.45 x 4.92 inch.Weight: approx. 210g.Package included:1 x hand shower.Note:1. Please allow 0-2cm error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from